/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:15:52,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:15:52,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:15:52,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 16:15:52,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 16:15:52,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 16:15:52,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 16:15:52,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 16:15:52,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 16:15:52,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 16:15:52,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 16:15:52,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 16:15:52,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 16:15:52,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 16:15:52,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 16:15:52,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 16:15:52,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 16:15:52,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 16:15:52,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 16:15:52,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 16:15:52,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 16:15:52,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 16:15:52,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 16:15:52,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 16:15:52,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 16:15:52,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:15:52,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:15:52,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:15:52,497 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-Separate.epf [2022-01-18 16:15:52,520 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:15:52,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:15:52,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:15:52,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:15:52,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:15:52,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:15:52,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:15:52,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:15:52,522 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:15:52,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:15:52,523 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:15:52,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:15:52,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:15:52,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:15:52,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:15:52,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:15:52,525 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:15:52,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:15:52,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:15:52,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:15:52,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:15:52,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:15:52,766 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:15:52,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2022-01-18 16:15:52,767 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2022-01-18 16:15:52,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:15:52,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:15:52,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:15:52,801 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:15:52,801 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:15:52,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,823 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:15:52,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:15:52,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:15:52,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:15:52,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:15:52,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:15:52,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:15:52,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:15:52,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:15:52,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/1) ... [2022-01-18 16:15:52,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:15:52,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:52,884 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) [2022-01-18 16:15:52,904 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 [2022-01-18 16:15:52,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:15:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:15:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:15:52,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:15:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:15:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:15:52,925 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:15:52,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:15:52,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:15:52,926 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:15:52,979 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:15:52,980 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:15:53,073 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:15:53,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:15:53,083 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:15:53,084 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:15:53 BoogieIcfgContainer [2022-01-18 16:15:53,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:15:53,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:15:53,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:15:53,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:15:53,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:15:52" (1/2) ... [2022-01-18 16:15:53,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff723d0 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:15:53, skipping insertion in model container [2022-01-18 16:15:53,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:15:53" (2/2) ... [2022-01-18 16:15:53,111 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2022-01-18 16:15:53,114 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:15:53,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:15:53,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:15:53,114 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:15:53,149 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 16:15:53,180 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:15:53,185 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:15:53,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 16:15:53,203 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2022-01-18 16:15:53,226 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 16:15:53,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:53,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:53,258 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:53,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1960784707, now seen corresponding path program 1 times [2022-01-18 16:15:53,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:53,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393372988] [2022-01-18 16:15:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:53,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:53,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:53,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393372988] [2022-01-18 16:15:53,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393372988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:15:53,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:15:53,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:15:53,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502454079] [2022-01-18 16:15:53,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:15:53,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:15:53,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:15:53,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:15:53,460 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:53,507 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2022-01-18 16:15:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:15:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 16:15:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:53,516 INFO L225 Difference]: With dead ends: 84 [2022-01-18 16:15:53,516 INFO L226 Difference]: Without dead ends: 84 [2022-01-18 16:15:53,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:15:53,519 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:53,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:15:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-18 16:15:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-18 16:15:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2022-01-18 16:15:53,591 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2022-01-18 16:15:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:53,592 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2022-01-18 16:15:53,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2022-01-18 16:15:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:15:53,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:53,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:53,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:15:53,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 273858138, now seen corresponding path program 1 times [2022-01-18 16:15:53,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:53,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799205586] [2022-01-18 16:15:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:53,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:53,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:53,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799205586] [2022-01-18 16:15:53,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799205586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:53,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005892473] [2022-01-18 16:15:53,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:53,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:53,882 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) [2022-01-18 16:15:53,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:15:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:15:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:54,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:54,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005892473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:54,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:54,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-18 16:15:54,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209976278] [2022-01-18 16:15:54,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 16:15:54,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 16:15:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-18 16:15:54,336 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:54,669 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2022-01-18 16:15:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 16:15:54,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:15:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:54,670 INFO L225 Difference]: With dead ends: 197 [2022-01-18 16:15:54,671 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 16:15:54,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-01-18 16:15:54,672 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:54,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 139 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:15:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 16:15:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2022-01-18 16:15:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2022-01-18 16:15:54,680 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2022-01-18 16:15:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:54,680 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2022-01-18 16:15:54,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2022-01-18 16:15:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:15:54,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:54,681 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:54,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:54,897 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 [2022-01-18 16:15:54,898 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1123313272, now seen corresponding path program 2 times [2022-01-18 16:15:54,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:54,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126216832] [2022-01-18 16:15:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:54,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:55,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126216832] [2022-01-18 16:15:55,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126216832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303335480] [2022-01-18 16:15:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:15:55,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:55,050 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) [2022-01-18 16:15:55,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:15:55,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:15:55,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:55,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:15:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:55,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:55,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303335480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:55,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:55,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 16:15:55,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19471872] [2022-01-18 16:15:55,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:55,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 16:15:55,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:55,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 16:15:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-01-18 16:15:55,370 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:55,966 INFO L93 Difference]: Finished difference Result 257 states and 493 transitions. [2022-01-18 16:15:55,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:15:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:15:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:55,968 INFO L225 Difference]: With dead ends: 257 [2022-01-18 16:15:55,968 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 16:15:55,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:15:55,969 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:55,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 110 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:15:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 16:15:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 117. [2022-01-18 16:15:55,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2022-01-18 16:15:55,984 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2022-01-18 16:15:55,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:55,984 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2022-01-18 16:15:55,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:55,984 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2022-01-18 16:15:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:15:55,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:55,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:56,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-18 16:15:56,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-18 16:15:56,219 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:56,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1992490104, now seen corresponding path program 3 times [2022-01-18 16:15:56,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:56,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584340488] [2022-01-18 16:15:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:56,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:56,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584340488] [2022-01-18 16:15:56,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584340488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:15:56,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:15:56,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 16:15:56,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578646099] [2022-01-18 16:15:56,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:15:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 16:15:56,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:56,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 16:15:56,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:15:56,246 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-01-18 16:15:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:56,254 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2022-01-18 16:15:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 16:15:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:15:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:56,255 INFO L225 Difference]: With dead ends: 120 [2022-01-18 16:15:56,255 INFO L226 Difference]: Without dead ends: 120 [2022-01-18 16:15:56,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 16:15:56,256 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:56,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:15:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-18 16:15:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-18 16:15:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2022-01-18 16:15:56,262 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2022-01-18 16:15:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:56,262 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2022-01-18 16:15:56,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-01-18 16:15:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2022-01-18 16:15:56,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:15:56,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:56,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:56,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:15:56,263 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:56,264 INFO L85 PathProgramCache]: Analyzing trace with hash -928935378, now seen corresponding path program 4 times [2022-01-18 16:15:56,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:56,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711822113] [2022-01-18 16:15:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:56,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:56,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:56,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711822113] [2022-01-18 16:15:56,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711822113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617401739] [2022-01-18 16:15:56,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:15:56,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:56,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:56,353 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) [2022-01-18 16:15:56,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:15:56,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:15:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:56,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-18 16:15:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:56,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:56,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617401739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:56,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:56,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 16:15:56,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126094854] [2022-01-18 16:15:56,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:56,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 16:15:56,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 16:15:56,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 16:15:56,738 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:57,048 INFO L93 Difference]: Finished difference Result 198 states and 372 transitions. [2022-01-18 16:15:57,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:15:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:15:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:57,049 INFO L225 Difference]: With dead ends: 198 [2022-01-18 16:15:57,049 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 16:15:57,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:15:57,050 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:57,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 126 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:15:57,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 16:15:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 114. [2022-01-18 16:15:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2022-01-18 16:15:57,055 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2022-01-18 16:15:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:57,055 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2022-01-18 16:15:57,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2022-01-18 16:15:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:15:57,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:57,056 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:57,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:57,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:57,272 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -171096099, now seen corresponding path program 1 times [2022-01-18 16:15:57,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:57,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868018930] [2022-01-18 16:15:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:57,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:57,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868018930] [2022-01-18 16:15:57,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868018930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583301277] [2022-01-18 16:15:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:57,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:57,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:57,325 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) [2022-01-18 16:15:57,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:15:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 16:15:57,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:57,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:15:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:57,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:57,434 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:15:57,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-01-18 16:15:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:57,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583301277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:57,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:57,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 16:15:57,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318030211] [2022-01-18 16:15:57,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:57,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 16:15:57,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 16:15:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:15:57,443 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:57,499 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2022-01-18 16:15:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:15:57,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2022-01-18 16:15:57,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:57,500 INFO L225 Difference]: With dead ends: 152 [2022-01-18 16:15:57,500 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 16:15:57,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:15:57,501 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:57,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:15:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 16:15:57,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-01-18 16:15:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2022-01-18 16:15:57,505 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2022-01-18 16:15:57,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:57,505 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2022-01-18 16:15:57,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,505 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2022-01-18 16:15:57,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-18 16:15:57,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:57,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:57,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:57,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:57,722 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -506947209, now seen corresponding path program 5 times [2022-01-18 16:15:57,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375293408] [2022-01-18 16:15:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:57,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:57,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375293408] [2022-01-18 16:15:57,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375293408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966596328] [2022-01-18 16:15:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:15:57,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:57,776 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) [2022-01-18 16:15:57,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:15:57,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:15:57,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:57,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 16:15:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-18 16:15:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966596328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:15:57,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-18 16:15:57,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-18 16:15:57,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123499900] [2022-01-18 16:15:57,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:15:57,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:15:57,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:15:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:15:57,870 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:57,882 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2022-01-18 16:15:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:15:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-18 16:15:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:57,885 INFO L225 Difference]: With dead ends: 288 [2022-01-18 16:15:57,885 INFO L226 Difference]: Without dead ends: 257 [2022-01-18 16:15:57,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:15:57,886 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:57,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:15:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-18 16:15:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2022-01-18 16:15:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2022-01-18 16:15:57,891 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2022-01-18 16:15:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2022-01-18 16:15:57,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2022-01-18 16:15:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:15:57,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:57,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:57,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:58,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:58,109 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:58,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 202156410, now seen corresponding path program 2 times [2022-01-18 16:15:58,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:58,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329253451] [2022-01-18 16:15:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:58,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:58,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:58,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329253451] [2022-01-18 16:15:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329253451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:58,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818401909] [2022-01-18 16:15:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:15:58,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:58,290 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) [2022-01-18 16:15:58,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:15:58,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:15:58,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:15:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:58,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:15:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:58,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:15:58,739 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:15:58,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:15:58,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:58,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818401909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:15:58,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:15:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-01-18 16:15:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746846190] [2022-01-18 16:15:58,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:15:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:15:58,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:15:58,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:15:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:15:58,802 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:15:59,415 INFO L93 Difference]: Finished difference Result 390 states and 757 transitions. [2022-01-18 16:15:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:15:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:15:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:15:59,417 INFO L225 Difference]: With dead ends: 390 [2022-01-18 16:15:59,417 INFO L226 Difference]: Without dead ends: 358 [2022-01-18 16:15:59,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 16:15:59,418 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:15:59,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 281 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:15:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-01-18 16:15:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 246. [2022-01-18 16:15:59,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2022-01-18 16:15:59,424 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2022-01-18 16:15:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:15:59,424 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2022-01-18 16:15:59,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:15:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2022-01-18 16:15:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:15:59,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:15:59,425 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:15:59,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:15:59,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:59,626 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:15:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:15:59,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1479948104, now seen corresponding path program 3 times [2022-01-18 16:15:59,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:15:59,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243368604] [2022-01-18 16:15:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:15:59,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:15:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:15:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:15:59,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:15:59,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243368604] [2022-01-18 16:15:59,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243368604] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:15:59,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830095529] [2022-01-18 16:15:59,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:15:59,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:15:59,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:15:59,792 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) [2022-01-18 16:15:59,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:15:59,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:15:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:15:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:15:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:15:59,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:00,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:00,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:00,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:16:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:00,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830095529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:00,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:00,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:00,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752544508] [2022-01-18 16:16:00,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:00,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:00,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:00,333 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:01,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:01,291 INFO L93 Difference]: Finished difference Result 464 states and 901 transitions. [2022-01-18 16:16:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:16:01,292 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:01,293 INFO L225 Difference]: With dead ends: 464 [2022-01-18 16:16:01,293 INFO L226 Difference]: Without dead ends: 432 [2022-01-18 16:16:01,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=415, Invalid=2777, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 16:16:01,295 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 215 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:01,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 338 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:16:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-18 16:16:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 252. [2022-01-18 16:16:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2022-01-18 16:16:01,301 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2022-01-18 16:16:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:01,301 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2022-01-18 16:16:01,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2022-01-18 16:16:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:01,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:01,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:01,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:01,527 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 828023674, now seen corresponding path program 4 times [2022-01-18 16:16:01,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:01,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139499855] [2022-01-18 16:16:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:01,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:01,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139499855] [2022-01-18 16:16:01,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139499855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116687226] [2022-01-18 16:16:01,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:01,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:01,696 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) [2022-01-18 16:16:01,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:16:01,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:01,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:02,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:02,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:02,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:16:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:02,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116687226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:02,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:02,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:02,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556927554] [2022-01-18 16:16:02,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:02,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:02,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:02,463 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:03,685 INFO L93 Difference]: Finished difference Result 495 states and 962 transitions. [2022-01-18 16:16:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:16:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:03,693 INFO L225 Difference]: With dead ends: 495 [2022-01-18 16:16:03,693 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 16:16:03,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=481, Invalid=3301, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:16:03,695 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 235 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:03,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 384 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:16:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 16:16:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 253. [2022-01-18 16:16:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2022-01-18 16:16:03,733 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2022-01-18 16:16:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2022-01-18 16:16:03,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2022-01-18 16:16:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:03,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:03,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:03,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:03,939 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,SelfDestructingSolverStorable9 [2022-01-18 16:16:03,940 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2040701256, now seen corresponding path program 5 times [2022-01-18 16:16:03,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:03,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683061114] [2022-01-18 16:16:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:03,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:04,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:04,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683061114] [2022-01-18 16:16:04,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683061114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:04,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481234520] [2022-01-18 16:16:04,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:16:04,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:04,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:04,129 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) [2022-01-18 16:16:04,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:04,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:16:04,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:16:04,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:04,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:04,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:04,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:04,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:16:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:04,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481234520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:04,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:04,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:04,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428712653] [2022-01-18 16:16:04,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:04,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:04,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:04,654 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:06,095 INFO L93 Difference]: Finished difference Result 474 states and 919 transitions. [2022-01-18 16:16:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:16:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:06,097 INFO L225 Difference]: With dead ends: 474 [2022-01-18 16:16:06,097 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 16:16:06,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=576, Invalid=3714, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 16:16:06,099 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:06,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 328 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:16:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 16:16:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 257. [2022-01-18 16:16:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2022-01-18 16:16:06,107 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2022-01-18 16:16:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:06,107 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2022-01-18 16:16:06,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2022-01-18 16:16:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:06,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:06,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:06,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:06,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:06,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:06,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2105111822, now seen corresponding path program 6 times [2022-01-18 16:16:06,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:06,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084239840] [2022-01-18 16:16:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:06,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:06,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:06,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084239840] [2022-01-18 16:16:06,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084239840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:06,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296091526] [2022-01-18 16:16:06,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:06,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:06,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:06,499 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) [2022-01-18 16:16:06,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:16:06,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:16:06,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:06,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:16:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:06,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:07,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:07,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:16:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:07,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296091526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:07,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:07,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:16:07,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260997681] [2022-01-18 16:16:07,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:07,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:16:07,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:16:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:16:07,190 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:07,830 INFO L93 Difference]: Finished difference Result 446 states and 881 transitions. [2022-01-18 16:16:07,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:16:07,830 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:07,831 INFO L225 Difference]: With dead ends: 446 [2022-01-18 16:16:07,831 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 16:16:07,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:16:07,832 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:07,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 293 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 16:16:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2022-01-18 16:16:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2022-01-18 16:16:07,838 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2022-01-18 16:16:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:07,838 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2022-01-18 16:16:07,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2022-01-18 16:16:07,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:07,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:07,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:07,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:08,043 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,SelfDestructingSolverStorable11 [2022-01-18 16:16:08,043 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1872047740, now seen corresponding path program 7 times [2022-01-18 16:16:08,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921194572] [2022-01-18 16:16:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:08,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:08,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:08,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921194572] [2022-01-18 16:16:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921194572] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526742478] [2022-01-18 16:16:08,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:08,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:08,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:08,223 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) [2022-01-18 16:16:08,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:16:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:08,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:08,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:16:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:08,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:08,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:08,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:08,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526742478] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:08,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:16:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622290748] [2022-01-18 16:16:08,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:08,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:16:08,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:16:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:16:08,867 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:09,644 INFO L93 Difference]: Finished difference Result 485 states and 950 transitions. [2022-01-18 16:16:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:16:09,644 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:09,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:09,646 INFO L225 Difference]: With dead ends: 485 [2022-01-18 16:16:09,646 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 16:16:09,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:16:09,646 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:09,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 390 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:16:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 16:16:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 269. [2022-01-18 16:16:09,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2022-01-18 16:16:09,652 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2022-01-18 16:16:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:09,652 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2022-01-18 16:16:09,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2022-01-18 16:16:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:09,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:09,653 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:09,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:09,855 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,SelfDestructingSolverStorable12 [2022-01-18 16:16:09,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:09,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:09,855 INFO L85 PathProgramCache]: Analyzing trace with hash -114947778, now seen corresponding path program 8 times [2022-01-18 16:16:09,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:09,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139576637] [2022-01-18 16:16:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:09,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:10,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:10,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139576637] [2022-01-18 16:16:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139576637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:10,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394305462] [2022-01-18 16:16:10,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:10,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:10,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:10,067 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) [2022-01-18 16:16:10,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:16:10,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:10,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:10,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:10,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:10,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:10,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:10,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394305462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:10,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:16:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033098213] [2022-01-18 16:16:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:10,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:16:10,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:16:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:16:10,661 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:11,328 INFO L93 Difference]: Finished difference Result 537 states and 1045 transitions. [2022-01-18 16:16:11,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:16:11,328 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:11,330 INFO L225 Difference]: With dead ends: 537 [2022-01-18 16:16:11,330 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 16:16:11,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:16:11,331 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 134 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:11,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 318 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 16:16:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 270. [2022-01-18 16:16:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 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) [2022-01-18 16:16:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2022-01-18 16:16:11,337 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2022-01-18 16:16:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:11,337 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2022-01-18 16:16:11,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2022-01-18 16:16:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:11,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:11,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:11,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:11,555 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,SelfDestructingSolverStorable13 [2022-01-18 16:16:11,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1311294588, now seen corresponding path program 9 times [2022-01-18 16:16:11,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:11,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142276121] [2022-01-18 16:16:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:11,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:11,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142276121] [2022-01-18 16:16:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142276121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:11,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161086927] [2022-01-18 16:16:11,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:11,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:11,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:11,694 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) [2022-01-18 16:16:11,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:16:11,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:16:11,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:11,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:16:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:11,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:12,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:12,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:12,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161086927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:12,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:12,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:16:12,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246937471] [2022-01-18 16:16:12,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:12,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:16:12,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:16:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:16:12,229 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:13,466 INFO L93 Difference]: Finished difference Result 543 states and 1056 transitions. [2022-01-18 16:16:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:16:13,466 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:13,468 INFO L225 Difference]: With dead ends: 543 [2022-01-18 16:16:13,468 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 16:16:13,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:16:13,469 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 193 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:13,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 357 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:16:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 16:16:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 267. [2022-01-18 16:16:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2022-01-18 16:16:13,488 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2022-01-18 16:16:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:13,489 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2022-01-18 16:16:13,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2022-01-18 16:16:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:13,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:13,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:13,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:13,721 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,SelfDestructingSolverStorable14 [2022-01-18 16:16:13,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 290845078, now seen corresponding path program 10 times [2022-01-18 16:16:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:13,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023349269] [2022-01-18 16:16:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:13,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:13,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023349269] [2022-01-18 16:16:13,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023349269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:13,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488960932] [2022-01-18 16:16:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:13,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:13,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:13,893 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) [2022-01-18 16:16:13,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:16:13,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:13,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:13,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:13,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:14,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:14,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:14,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:14,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:14,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488960932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:14,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:14,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:16:14,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565831951] [2022-01-18 16:16:14,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:14,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:16:14,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:16:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:16:14,507 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:15,188 INFO L93 Difference]: Finished difference Result 435 states and 860 transitions. [2022-01-18 16:16:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:16:15,188 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:15,189 INFO L225 Difference]: With dead ends: 435 [2022-01-18 16:16:15,189 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 16:16:15,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:16:15,190 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 124 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:15,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 254 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 16:16:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 263. [2022-01-18 16:16:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2022-01-18 16:16:15,195 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2022-01-18 16:16:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:15,195 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2022-01-18 16:16:15,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2022-01-18 16:16:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:15,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:15,202 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:15,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:15,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:15,410 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1233884658, now seen corresponding path program 11 times [2022-01-18 16:16:15,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:15,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466050883] [2022-01-18 16:16:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:15,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:15,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466050883] [2022-01-18 16:16:15,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466050883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333203611] [2022-01-18 16:16:15,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:16:15,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:15,547 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) [2022-01-18 16:16:15,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:16:15,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:16:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:15,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-18 16:16:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:15,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:16,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:16,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:16,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333203611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:16,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:16,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:16,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052035560] [2022-01-18 16:16:16,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:16,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:16,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:16,223 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:16,786 INFO L93 Difference]: Finished difference Result 491 states and 960 transitions. [2022-01-18 16:16:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 16:16:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:16,788 INFO L225 Difference]: With dead ends: 491 [2022-01-18 16:16:16,788 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 16:16:16,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:16:16,789 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:16,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 260 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 16:16:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 275. [2022-01-18 16:16:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2022-01-18 16:16:16,794 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2022-01-18 16:16:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:16,794 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2022-01-18 16:16:16,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2022-01-18 16:16:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:16,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:16,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:16,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:17,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-18 16:16:17,021 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash -753110860, now seen corresponding path program 12 times [2022-01-18 16:16:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518414584] [2022-01-18 16:16:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:17,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:17,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518414584] [2022-01-18 16:16:17,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518414584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:17,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946087639] [2022-01-18 16:16:17,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:17,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:17,241 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) [2022-01-18 16:16:17,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:16:17,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:16:17,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:17,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:17,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:17,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:17,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:17,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946087639] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:17,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:17,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:17,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103808433] [2022-01-18 16:16:17,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:17,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:17,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:17,773 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:18,584 INFO L93 Difference]: Finished difference Result 543 states and 1055 transitions. [2022-01-18 16:16:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:16:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:18,586 INFO L225 Difference]: With dead ends: 543 [2022-01-18 16:16:18,586 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 16:16:18,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:16:18,587 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 158 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:18,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 295 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 16:16:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 276. [2022-01-18 16:16:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2022-01-18 16:16:18,592 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2022-01-18 16:16:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:18,592 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2022-01-18 16:16:18,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2022-01-18 16:16:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:18,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:18,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:18,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:18,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 16:16:18,807 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash 673131506, now seen corresponding path program 13 times [2022-01-18 16:16:18,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:18,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768037463] [2022-01-18 16:16:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:18,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:19,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768037463] [2022-01-18 16:16:19,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768037463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:19,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585332659] [2022-01-18 16:16:19,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:19,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:19,004 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) [2022-01-18 16:16:19,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:16:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:19,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:19,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:19,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:19,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:19,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585332659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:19,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:19,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:19,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450136175] [2022-01-18 16:16:19,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:19,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:19,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:19,609 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:20,806 INFO L93 Difference]: Finished difference Result 549 states and 1066 transitions. [2022-01-18 16:16:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:16:20,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:20,808 INFO L225 Difference]: With dead ends: 549 [2022-01-18 16:16:20,808 INFO L226 Difference]: Without dead ends: 517 [2022-01-18 16:16:20,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=491, Invalid=3291, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:16:20,809 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 192 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:20,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 306 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:16:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-18 16:16:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 273. [2022-01-18 16:16:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2022-01-18 16:16:20,814 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2022-01-18 16:16:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:20,814 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2022-01-18 16:16:20,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2022-01-18 16:16:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:20,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:20,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:20,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:21,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:21,042 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:21,043 INFO L85 PathProgramCache]: Analyzing trace with hash -347318004, now seen corresponding path program 14 times [2022-01-18 16:16:21,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:21,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436157217] [2022-01-18 16:16:21,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:21,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:21,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436157217] [2022-01-18 16:16:21,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436157217] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:21,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13908509] [2022-01-18 16:16:21,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:21,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:21,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:21,193 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) [2022-01-18 16:16:21,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:16:21,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:21,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:21,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:21,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:21,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13908509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:21,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:21,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:21,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786157677] [2022-01-18 16:16:21,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:21,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:21,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:21,792 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:22,643 INFO L93 Difference]: Finished difference Result 441 states and 870 transitions. [2022-01-18 16:16:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:16:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:22,645 INFO L225 Difference]: With dead ends: 441 [2022-01-18 16:16:22,645 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 16:16:22,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:16:22,646 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:22,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 247 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:16:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 16:16:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 266. [2022-01-18 16:16:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2022-01-18 16:16:22,668 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2022-01-18 16:16:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:22,668 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2022-01-18 16:16:22,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2022-01-18 16:16:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:22,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:22,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:22,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:22,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:22,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash 601747836, now seen corresponding path program 15 times [2022-01-18 16:16:22,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781914638] [2022-01-18 16:16:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:22,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:23,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781914638] [2022-01-18 16:16:23,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781914638] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489619127] [2022-01-18 16:16:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:23,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:23,054 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) [2022-01-18 16:16:23,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:16:23,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:16:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:16:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:23,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:23,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:23,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:23,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:23,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489619127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:23,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:23,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:23,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421164327] [2022-01-18 16:16:23,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:23,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:23,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:23,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:23,602 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:24,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:24,134 INFO L93 Difference]: Finished difference Result 467 states and 909 transitions. [2022-01-18 16:16:24,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 16:16:24,134 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:24,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:24,135 INFO L225 Difference]: With dead ends: 467 [2022-01-18 16:16:24,135 INFO L226 Difference]: Without dead ends: 435 [2022-01-18 16:16:24,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 16:16:24,136 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:24,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 242 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:16:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-18 16:16:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 263. [2022-01-18 16:16:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2022-01-18 16:16:24,141 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2022-01-18 16:16:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:24,141 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2022-01-18 16:16:24,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2022-01-18 16:16:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:24,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:24,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:24,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:24,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:24,368 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1385247682, now seen corresponding path program 16 times [2022-01-18 16:16:24,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704329822] [2022-01-18 16:16:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:24,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:24,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704329822] [2022-01-18 16:16:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704329822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927545667] [2022-01-18 16:16:24,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:24,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:24,512 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) [2022-01-18 16:16:24,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:16:24,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:24,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:24,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:24,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:24,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:24,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:24,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927545667] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:24,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:24,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:24,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146339733] [2022-01-18 16:16:24,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:24,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:24,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:24,934 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:25,722 INFO L93 Difference]: Finished difference Result 520 states and 1006 transitions. [2022-01-18 16:16:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 16:16:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:25,724 INFO L225 Difference]: With dead ends: 520 [2022-01-18 16:16:25,724 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 16:16:25,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:16:25,725 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 151 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:25,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 218 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 16:16:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 264. [2022-01-18 16:16:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2022-01-18 16:16:25,730 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2022-01-18 16:16:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:25,730 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2022-01-18 16:16:25,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2022-01-18 16:16:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:25,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:25,731 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:25,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:25,947 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,SelfDestructingSolverStorable21 [2022-01-18 16:16:25,947 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash 40994684, now seen corresponding path program 17 times [2022-01-18 16:16:25,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794387683] [2022-01-18 16:16:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:25,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:26,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794387683] [2022-01-18 16:16:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794387683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989578812] [2022-01-18 16:16:26,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:16:26,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:26,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:26,165 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) [2022-01-18 16:16:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:16:26,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:26,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 16:16:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:26,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:26,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:26,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:26,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:26,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989578812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:26,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:26,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:26,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725906852] [2022-01-18 16:16:26,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:26,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:26,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:26,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:26,731 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:27,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:27,611 INFO L93 Difference]: Finished difference Result 529 states and 1022 transitions. [2022-01-18 16:16:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:16:27,611 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:27,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:27,613 INFO L225 Difference]: With dead ends: 529 [2022-01-18 16:16:27,613 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 16:16:27,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=3286, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:16:27,614 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:27,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 366 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:16:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 16:16:27,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 255. [2022-01-18 16:16:27,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2022-01-18 16:16:27,619 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2022-01-18 16:16:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:27,619 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2022-01-18 16:16:27,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2022-01-18 16:16:27,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:16:27,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:27,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:27,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:27,839 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,SelfDestructingSolverStorable22 [2022-01-18 16:16:27,839 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:27,840 INFO L85 PathProgramCache]: Analyzing trace with hash -979454826, now seen corresponding path program 18 times [2022-01-18 16:16:27,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:27,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016133872] [2022-01-18 16:16:27,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:27,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:27,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016133872] [2022-01-18 16:16:27,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016133872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941165055] [2022-01-18 16:16:27,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:27,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:27,967 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) [2022-01-18 16:16:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:16:27,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:16:27,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:27,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-18 16:16:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:28,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:28,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:28,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:16:28,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-18 16:16:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:28,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941165055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:28,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:28,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-01-18 16:16:28,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65186473] [2022-01-18 16:16:28,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:28,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:16:28,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:28,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:16:28,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:16:28,483 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:29,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:29,211 INFO L93 Difference]: Finished difference Result 418 states and 821 transitions. [2022-01-18 16:16:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:16:29,211 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:16:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:29,213 INFO L225 Difference]: With dead ends: 418 [2022-01-18 16:16:29,213 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 16:16:29,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:16:29,214 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:29,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 269 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 16:16:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 16:16:29,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 233. [2022-01-18 16:16:29,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2022-01-18 16:16:29,228 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2022-01-18 16:16:29,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2022-01-18 16:16:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-01-18 16:16:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2022-01-18 16:16:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:16:29,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:29,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:29,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:29,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:29,443 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:29,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1446761785, now seen corresponding path program 19 times [2022-01-18 16:16:29,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:29,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825160118] [2022-01-18 16:16:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:29,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:29,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825160118] [2022-01-18 16:16:29,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825160118] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790711902] [2022-01-18 16:16:29,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:29,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:29,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:29,499 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) [2022-01-18 16:16:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:16:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-18 16:16:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:29,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-18 16:16:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:29,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:29,657 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 16:16:29,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-01-18 16:16:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790711902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:29,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:29,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 16:16:29,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646957512] [2022-01-18 16:16:29,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:29,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 16:16:29,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 16:16:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:16:29,677 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:29,889 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2022-01-18 16:16:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 16:16:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:16:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:29,890 INFO L225 Difference]: With dead ends: 362 [2022-01-18 16:16:29,890 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 16:16:29,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:16:29,891 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:29,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 300 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:16:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 16:16:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2022-01-18 16:16:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 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) [2022-01-18 16:16:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2022-01-18 16:16:29,895 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2022-01-18 16:16:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:29,895 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2022-01-18 16:16:29,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2022-01-18 16:16:29,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 16:16:29,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:29,895 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:29,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 16:16:30,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:30,111 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1247278231, now seen corresponding path program 20 times [2022-01-18 16:16:30,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:30,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163282421] [2022-01-18 16:16:30,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:30,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:30,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163282421] [2022-01-18 16:16:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163282421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:30,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060465486] [2022-01-18 16:16:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:30,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:30,189 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) [2022-01-18 16:16:30,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:16:30,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:30,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:16:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:30,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:30,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060465486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:30,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:30,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:16:30,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141891094] [2022-01-18 16:16:30,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:30,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:16:30,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:16:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:16:30,280 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:30,295 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2022-01-18 16:16:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:16:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 16:16:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:30,296 INFO L225 Difference]: With dead ends: 534 [2022-01-18 16:16:30,297 INFO L226 Difference]: Without dead ends: 491 [2022-01-18 16:16:30,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:16:30,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:30,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 81 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:16:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-18 16:16:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2022-01-18 16:16:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2022-01-18 16:16:30,302 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2022-01-18 16:16:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:30,302 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2022-01-18 16:16:30,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:30,303 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2022-01-18 16:16:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:30,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:30,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:30,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:30,525 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,SelfDestructingSolverStorable25 [2022-01-18 16:16:30,526 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1300048086, now seen corresponding path program 21 times [2022-01-18 16:16:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595923700] [2022-01-18 16:16:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:30,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:30,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595923700] [2022-01-18 16:16:30,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595923700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658016844] [2022-01-18 16:16:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:30,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:30,759 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) [2022-01-18 16:16:30,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:16:30,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:16:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:31,062 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:16:31,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:16:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:31,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:31,474 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:31,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:31,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658016844] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:31,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:31,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-01-18 16:16:31,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490763855] [2022-01-18 16:16:31,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:31,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:16:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:16:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:16:31,585 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:32,970 INFO L93 Difference]: Finished difference Result 840 states and 1688 transitions. [2022-01-18 16:16:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:16:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:32,972 INFO L225 Difference]: With dead ends: 840 [2022-01-18 16:16:32,972 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 16:16:32,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:16:32,973 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:32,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 621 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1677 Invalid, 0 Unknown, 113 Unchecked, 0.7s Time] [2022-01-18 16:16:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 16:16:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 429. [2022-01-18 16:16:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0514018691588785) internal successors, (878), 428 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 878 transitions. [2022-01-18 16:16:32,979 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 878 transitions. Word has length 33 [2022-01-18 16:16:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:32,979 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 878 transitions. [2022-01-18 16:16:32,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 878 transitions. [2022-01-18 16:16:32,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:32,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:32,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:33,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:33,192 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,SelfDestructingSolverStorable26 [2022-01-18 16:16:33,192 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2063366420, now seen corresponding path program 22 times [2022-01-18 16:16:33,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:33,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918355538] [2022-01-18 16:16:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:33,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:33,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918355538] [2022-01-18 16:16:33,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918355538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:33,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048348381] [2022-01-18 16:16:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:33,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:33,401 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) [2022-01-18 16:16:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:16:33,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:33,666 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:16:33,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:16:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:33,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:34,074 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:34,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:34,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048348381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:34,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:34,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:16:34,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389685903] [2022-01-18 16:16:34,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:34,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:16:34,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:16:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:16:34,120 INFO L87 Difference]: Start difference. First operand 429 states and 878 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:35,766 INFO L93 Difference]: Finished difference Result 990 states and 1989 transitions. [2022-01-18 16:16:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:16:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:35,769 INFO L225 Difference]: With dead ends: 990 [2022-01-18 16:16:35,769 INFO L226 Difference]: Without dead ends: 942 [2022-01-18 16:16:35,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:16:35,770 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 310 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:35,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 563 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1624 Invalid, 0 Unknown, 14 Unchecked, 0.6s Time] [2022-01-18 16:16:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-01-18 16:16:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 432. [2022-01-18 16:16:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.0580046403712298) internal successors, (887), 431 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 887 transitions. [2022-01-18 16:16:35,776 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 887 transitions. Word has length 33 [2022-01-18 16:16:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:35,777 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 887 transitions. [2022-01-18 16:16:35,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 887 transitions. [2022-01-18 16:16:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:35,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:35,778 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:35,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 16:16:35,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 16:16:35,991 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash -952229162, now seen corresponding path program 23 times [2022-01-18 16:16:35,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917037008] [2022-01-18 16:16:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:35,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:36,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917037008] [2022-01-18 16:16:36,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917037008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:36,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51680081] [2022-01-18 16:16:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:16:36,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:36,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:36,210 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) [2022-01-18 16:16:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:16:36,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:16:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:36,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:36,496 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:16:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:16:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:37,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:37,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:16:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51680081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:37,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:37,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-01-18 16:16:37,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238878860] [2022-01-18 16:16:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:37,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 16:16:37,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:37,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 16:16:37,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:16:37,160 INFO L87 Difference]: Start difference. First operand 432 states and 887 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:39,679 INFO L93 Difference]: Finished difference Result 1010 states and 2038 transitions. [2022-01-18 16:16:39,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:16:39,680 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:39,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:39,682 INFO L225 Difference]: With dead ends: 1010 [2022-01-18 16:16:39,682 INFO L226 Difference]: Without dead ends: 962 [2022-01-18 16:16:39,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=843, Invalid=9459, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:16:39,684 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 295 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:39,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 650 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2556 Invalid, 0 Unknown, 36 Unchecked, 0.9s Time] [2022-01-18 16:16:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-18 16:16:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 433. [2022-01-18 16:16:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.0578703703703702) internal successors, (889), 432 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 889 transitions. [2022-01-18 16:16:39,691 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 889 transitions. Word has length 33 [2022-01-18 16:16:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 889 transitions. [2022-01-18 16:16:39,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 889 transitions. [2022-01-18 16:16:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:39,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:39,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:39,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:39,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 16:16:39,912 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 433393428, now seen corresponding path program 24 times [2022-01-18 16:16:39,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:39,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334511764] [2022-01-18 16:16:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:39,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:40,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334511764] [2022-01-18 16:16:40,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334511764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503552083] [2022-01-18 16:16:40,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:16:40,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:40,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:40,155 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) [2022-01-18 16:16:40,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:16:40,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:16:40,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:16:40,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:40,480 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:16:40,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:16:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:40,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:40,945 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:40,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:40,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503552083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:40,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:40,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:16:40,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744248570] [2022-01-18 16:16:40,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:40,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:16:40,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:16:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:16:40,986 INFO L87 Difference]: Start difference. First operand 433 states and 889 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:42,792 INFO L93 Difference]: Finished difference Result 1121 states and 2248 transitions. [2022-01-18 16:16:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:16:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:42,802 INFO L225 Difference]: With dead ends: 1121 [2022-01-18 16:16:42,802 INFO L226 Difference]: Without dead ends: 1077 [2022-01-18 16:16:42,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:16:42,803 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 359 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:42,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 583 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2124 Invalid, 0 Unknown, 33 Unchecked, 0.6s Time] [2022-01-18 16:16:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-01-18 16:16:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 436. [2022-01-18 16:16:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.057471264367816) internal successors, (895), 435 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 895 transitions. [2022-01-18 16:16:42,826 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 895 transitions. Word has length 33 [2022-01-18 16:16:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:42,827 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 895 transitions. [2022-01-18 16:16:42,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 895 transitions. [2022-01-18 16:16:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:42,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:42,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:42,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 16:16:43,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:43,028 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash -207717162, now seen corresponding path program 25 times [2022-01-18 16:16:43,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:43,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534759132] [2022-01-18 16:16:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:43,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:43,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534759132] [2022-01-18 16:16:43,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534759132] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:43,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086255188] [2022-01-18 16:16:43,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:16:43,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:43,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:43,306 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) [2022-01-18 16:16:43,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:16:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:43,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:43,595 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:16:43,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:16:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:43,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:44,209 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:44,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:44,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086255188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:44,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:44,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:16:44,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166178303] [2022-01-18 16:16:44,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:44,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:16:44,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:16:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:16:44,276 INFO L87 Difference]: Start difference. First operand 436 states and 895 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:47,157 INFO L93 Difference]: Finished difference Result 1186 states and 2391 transitions. [2022-01-18 16:16:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 16:16:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:47,160 INFO L225 Difference]: With dead ends: 1186 [2022-01-18 16:16:47,160 INFO L226 Difference]: Without dead ends: 1142 [2022-01-18 16:16:47,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1159, Invalid=9761, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:16:47,165 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 400 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:47,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 577 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2149 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2022-01-18 16:16:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-01-18 16:16:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 442. [2022-01-18 16:16:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.058956916099773) internal successors, (908), 441 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 908 transitions. [2022-01-18 16:16:47,191 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 908 transitions. Word has length 33 [2022-01-18 16:16:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:47,191 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 908 transitions. [2022-01-18 16:16:47,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 908 transitions. [2022-01-18 16:16:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:47,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:47,192 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:47,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:47,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:47,399 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:47,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1218525204, now seen corresponding path program 26 times [2022-01-18 16:16:47,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:47,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913983436] [2022-01-18 16:16:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:47,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:47,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913983436] [2022-01-18 16:16:47,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913983436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:47,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024832998] [2022-01-18 16:16:47,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:16:47,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:47,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:47,631 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) [2022-01-18 16:16:47,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:16:47,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:16:47,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:47,852 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:16:47,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:16:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:47,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:48,275 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:48,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:48,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024832998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:48,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:48,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:16:48,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366388829] [2022-01-18 16:16:48,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:48,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:16:48,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:48,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:16:48,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:16:48,334 INFO L87 Difference]: Start difference. First operand 442 states and 908 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:51,539 INFO L93 Difference]: Finished difference Result 1365 states and 2739 transitions. [2022-01-18 16:16:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:16:51,540 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:51,543 INFO L225 Difference]: With dead ends: 1365 [2022-01-18 16:16:51,543 INFO L226 Difference]: Without dead ends: 1325 [2022-01-18 16:16:51,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1492, Invalid=11164, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:16:51,545 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 462 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:51,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 672 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2581 Invalid, 0 Unknown, 40 Unchecked, 0.8s Time] [2022-01-18 16:16:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-18 16:16:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 450. [2022-01-18 16:16:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.0579064587973273) internal successors, (924), 449 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 924 transitions. [2022-01-18 16:16:51,554 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 924 transitions. Word has length 33 [2022-01-18 16:16:51,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:51,554 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 924 transitions. [2022-01-18 16:16:51,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:51,554 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 924 transitions. [2022-01-18 16:16:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:51,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:51,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:51,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:51,771 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,SelfDestructingSolverStorable31 [2022-01-18 16:16:51,771 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:51,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash -560176048, now seen corresponding path program 27 times [2022-01-18 16:16:51,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:51,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870332092] [2022-01-18 16:16:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:51,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:51,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870332092] [2022-01-18 16:16:51,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870332092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:51,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605684030] [2022-01-18 16:16:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:16:51,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:51,988 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) [2022-01-18 16:16:51,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:16:52,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:16:52,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:16:52,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:16:52,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:16:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:52,812 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:52,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605684030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:52,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:16:52,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822394894] [2022-01-18 16:16:52,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:16:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:16:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:16:52,863 INFO L87 Difference]: Start difference. First operand 450 states and 924 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:53,622 INFO L93 Difference]: Finished difference Result 657 states and 1310 transitions. [2022-01-18 16:16:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 16:16:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:53,624 INFO L225 Difference]: With dead ends: 657 [2022-01-18 16:16:53,624 INFO L226 Difference]: Without dead ends: 625 [2022-01-18 16:16:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:16:53,625 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 707 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 997 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2022-01-18 16:16:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-18 16:16:53,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 474. [2022-01-18 16:16:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.059196617336152) internal successors, (974), 473 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 974 transitions. [2022-01-18 16:16:53,642 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 974 transitions. Word has length 33 [2022-01-18 16:16:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:53,642 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 974 transitions. [2022-01-18 16:16:53,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 974 transitions. [2022-01-18 16:16:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:53,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:53,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:53,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-18 16:16:53,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:53,858 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash 2059320862, now seen corresponding path program 28 times [2022-01-18 16:16:53,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:53,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210551126] [2022-01-18 16:16:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:53,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:54,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210551126] [2022-01-18 16:16:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210551126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006412175] [2022-01-18 16:16:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:16:54,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:54,152 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) [2022-01-18 16:16:54,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:16:54,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:16:54,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:16:54,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:16:54,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:16:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:54,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:55,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:55,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:16:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:55,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006412175] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:55,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:55,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:16:55,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346224162] [2022-01-18 16:16:55,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:55,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:16:55,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:16:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:16:55,160 INFO L87 Difference]: Start difference. First operand 474 states and 974 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:56,152 INFO L93 Difference]: Finished difference Result 858 states and 1706 transitions. [2022-01-18 16:16:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:16:56,152 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:56,154 INFO L225 Difference]: With dead ends: 858 [2022-01-18 16:16:56,154 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 16:16:56,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=415, Invalid=4697, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:16:56,155 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:56,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 597 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1281 Invalid, 0 Unknown, 467 Unchecked, 0.4s Time] [2022-01-18 16:16:56,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 16:16:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 482. [2022-01-18 16:16:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.0644490644490645) internal successors, (993), 481 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 993 transitions. [2022-01-18 16:16:56,162 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 993 transitions. Word has length 33 [2022-01-18 16:16:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:56,162 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 993 transitions. [2022-01-18 16:16:56,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:56,162 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 993 transitions. [2022-01-18 16:16:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:56,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:56,163 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:56,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:56,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:56,375 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash 719195666, now seen corresponding path program 29 times [2022-01-18 16:16:56,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:56,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278112498] [2022-01-18 16:16:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:56,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:16:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:56,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:16:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278112498] [2022-01-18 16:16:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278112498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:16:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834296219] [2022-01-18 16:16:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:16:56,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:16:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:16:56,692 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) [2022-01-18 16:16:56,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:16:56,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:16:56,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:16:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:16:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:16:57,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:16:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:16:57,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:16:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:57,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:16:57,852 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:16:57,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:16:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:16:57,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834296219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:16:57,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:16:57,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:16:57,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572318518] [2022-01-18 16:16:57,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:16:57,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:16:57,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:16:57,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:16:57,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:16:57,909 INFO L87 Difference]: Start difference. First operand 482 states and 993 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:16:59,731 INFO L93 Difference]: Finished difference Result 938 states and 1891 transitions. [2022-01-18 16:16:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:16:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:16:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:16:59,734 INFO L225 Difference]: With dead ends: 938 [2022-01-18 16:16:59,734 INFO L226 Difference]: Without dead ends: 895 [2022-01-18 16:16:59,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=557, Invalid=6415, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:16:59,735 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 251 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 825 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:16:59,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 611 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1542 Invalid, 0 Unknown, 825 Unchecked, 0.6s Time] [2022-01-18 16:16:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-01-18 16:16:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 489. [2022-01-18 16:16:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.057377049180328) internal successors, (1004), 488 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1004 transitions. [2022-01-18 16:16:59,741 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1004 transitions. Word has length 33 [2022-01-18 16:16:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:16:59,741 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1004 transitions. [2022-01-18 16:16:59,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:16:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1004 transitions. [2022-01-18 16:16:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:16:59,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:16:59,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:16:59,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 16:16:59,955 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,SelfDestructingSolverStorable34 [2022-01-18 16:16:59,955 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:16:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:16:59,955 INFO L85 PathProgramCache]: Analyzing trace with hash -57190306, now seen corresponding path program 30 times [2022-01-18 16:16:59,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:16:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069411102] [2022-01-18 16:16:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:16:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:16:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:00,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:00,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069411102] [2022-01-18 16:17:00,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069411102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:00,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934183627] [2022-01-18 16:17:00,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:00,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:00,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:00,233 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) [2022-01-18 16:17:00,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:17:00,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:17:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:17:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:00,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:17:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:00,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:01,221 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:01,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:01,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934183627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:01,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:01,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:01,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830410218] [2022-01-18 16:17:01,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:01,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:01,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:01,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:01,275 INFO L87 Difference]: Start difference. First operand 489 states and 1004 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:02,630 INFO L93 Difference]: Finished difference Result 772 states and 1570 transitions. [2022-01-18 16:17:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:17:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:02,632 INFO L225 Difference]: With dead ends: 772 [2022-01-18 16:17:02,632 INFO L226 Difference]: Without dead ends: 753 [2022-01-18 16:17:02,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:17:02,633 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:02,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 460 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1277 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-01-18 16:17:02,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-18 16:17:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 485. [2022-01-18 16:17:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.06198347107438) internal successors, (998), 484 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 998 transitions. [2022-01-18 16:17:02,639 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 998 transitions. Word has length 33 [2022-01-18 16:17:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:02,639 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 998 transitions. [2022-01-18 16:17:02,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 998 transitions. [2022-01-18 16:17:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:02,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:02,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:02,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:02,854 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,SelfDestructingSolverStorable35 [2022-01-18 16:17:02,854 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:02,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash 426212954, now seen corresponding path program 31 times [2022-01-18 16:17:02,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024188609] [2022-01-18 16:17:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:03,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:03,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024188609] [2022-01-18 16:17:03,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024188609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:03,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801775995] [2022-01-18 16:17:03,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:17:03,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:03,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:03,127 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) [2022-01-18 16:17:03,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:17:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:03,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:03,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:03,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:04,038 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:04,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:04,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801775995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:04,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:04,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270959863] [2022-01-18 16:17:04,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:04,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:04,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:04,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:04,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:04,090 INFO L87 Difference]: Start difference. First operand 485 states and 998 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:05,560 INFO L93 Difference]: Finished difference Result 930 states and 1875 transitions. [2022-01-18 16:17:05,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:17:05,561 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:05,563 INFO L225 Difference]: With dead ends: 930 [2022-01-18 16:17:05,563 INFO L226 Difference]: Without dead ends: 890 [2022-01-18 16:17:05,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=512, Invalid=5494, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:17:05,564 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 212 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:05,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 496 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1211 Invalid, 0 Unknown, 644 Unchecked, 0.5s Time] [2022-01-18 16:17:05,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-01-18 16:17:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 483. [2022-01-18 16:17:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.0643153526970957) internal successors, (995), 482 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 995 transitions. [2022-01-18 16:17:05,570 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 995 transitions. Word has length 33 [2022-01-18 16:17:05,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:05,570 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 995 transitions. [2022-01-18 16:17:05,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 995 transitions. [2022-01-18 16:17:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:05,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:05,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:05,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:05,772 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,SelfDestructingSolverStorable36 [2022-01-18 16:17:05,773 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:05,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2104818256, now seen corresponding path program 32 times [2022-01-18 16:17:05,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:05,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046934018] [2022-01-18 16:17:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:05,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:06,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046934018] [2022-01-18 16:17:06,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046934018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042377563] [2022-01-18 16:17:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:17:06,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:06,049 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) [2022-01-18 16:17:06,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:17:06,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:17:06,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:06,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:06,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:06,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:06,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:07,047 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:07,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:07,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042377563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:07,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:07,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:07,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726573672] [2022-01-18 16:17:07,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:07,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:07,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:07,100 INFO L87 Difference]: Start difference. First operand 483 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:08,810 INFO L93 Difference]: Finished difference Result 1240 states and 2502 transitions. [2022-01-18 16:17:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:17:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:08,820 INFO L225 Difference]: With dead ends: 1240 [2022-01-18 16:17:08,821 INFO L226 Difference]: Without dead ends: 1196 [2022-01-18 16:17:08,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=579, Invalid=5741, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:17:08,821 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 235 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:08,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 687 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1517 Invalid, 0 Unknown, 796 Unchecked, 0.5s Time] [2022-01-18 16:17:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-01-18 16:17:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 484. [2022-01-18 16:17:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0641821946169774) internal successors, (997), 483 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 997 transitions. [2022-01-18 16:17:08,829 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 997 transitions. Word has length 33 [2022-01-18 16:17:08,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:08,829 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 997 transitions. [2022-01-18 16:17:08,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 997 transitions. [2022-01-18 16:17:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:08,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:08,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:08,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:09,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:09,043 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash 688170706, now seen corresponding path program 33 times [2022-01-18 16:17:09,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:09,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606089456] [2022-01-18 16:17:09,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:09,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:09,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:09,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606089456] [2022-01-18 16:17:09,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606089456] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055706166] [2022-01-18 16:17:09,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:17:09,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:09,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:09,376 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) [2022-01-18 16:17:09,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 16:17:09,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:17:09,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:09,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:09,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:09,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:10,267 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:10,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:10,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:10,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055706166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:10,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:10,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:10,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102469764] [2022-01-18 16:17:10,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:10,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:10,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:10,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:10,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:10,304 INFO L87 Difference]: Start difference. First operand 484 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:11,990 INFO L93 Difference]: Finished difference Result 1015 states and 2027 transitions. [2022-01-18 16:17:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:17:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:11,992 INFO L225 Difference]: With dead ends: 1015 [2022-01-18 16:17:11,992 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 16:17:11,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=783, Invalid=8529, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:17:11,993 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:11,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 649 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1521 Invalid, 0 Unknown, 1149 Unchecked, 0.4s Time] [2022-01-18 16:17:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 16:17:11,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 485. [2022-01-18 16:17:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.0640495867768593) internal successors, (999), 484 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 999 transitions. [2022-01-18 16:17:12,000 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 999 transitions. Word has length 33 [2022-01-18 16:17:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:12,000 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 999 transitions. [2022-01-18 16:17:12,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 999 transitions. [2022-01-18 16:17:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:12,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:12,001 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:12,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 16:17:12,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 16:17:12,216 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:12,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1079366512, now seen corresponding path program 34 times [2022-01-18 16:17:12,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:12,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801099329] [2022-01-18 16:17:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:12,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:12,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801099329] [2022-01-18 16:17:12,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801099329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104906110] [2022-01-18 16:17:12,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:17:12,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:12,437 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) [2022-01-18 16:17:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 16:17:12,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:17:12,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:12,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:12,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:12,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:12,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:13,428 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:13,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:13,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104906110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:13,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:13,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:13,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389953416] [2022-01-18 16:17:13,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:13,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:13,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:13,519 INFO L87 Difference]: Start difference. First operand 485 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:14,828 INFO L93 Difference]: Finished difference Result 901 states and 1823 transitions. [2022-01-18 16:17:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:17:14,828 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:14,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:14,829 INFO L225 Difference]: With dead ends: 901 [2022-01-18 16:17:14,829 INFO L226 Difference]: Without dead ends: 865 [2022-01-18 16:17:14,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:17:14,830 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:14,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 769 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1861 Invalid, 0 Unknown, 234 Unchecked, 0.5s Time] [2022-01-18 16:17:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-01-18 16:17:14,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 486. [2022-01-18 16:17:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.063917525773196) internal successors, (1001), 485 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:14,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1001 transitions. [2022-01-18 16:17:14,837 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1001 transitions. Word has length 33 [2022-01-18 16:17:14,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:14,837 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1001 transitions. [2022-01-18 16:17:14,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1001 transitions. [2022-01-18 16:17:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:14,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:14,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:14,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:15,054 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,SelfDestructingSolverStorable39 [2022-01-18 16:17:15,054 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:15,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:15,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1463707666, now seen corresponding path program 35 times [2022-01-18 16:17:15,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:15,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156927949] [2022-01-18 16:17:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:15,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:15,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156927949] [2022-01-18 16:17:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156927949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015593309] [2022-01-18 16:17:15,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:17:15,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:15,271 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) [2022-01-18 16:17:15,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 16:17:15,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:17:15,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:15,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:17:15,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:15,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:15,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:15,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:16,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:16,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:16,182 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:17:16,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:17:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:16,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015593309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:16,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:16,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:17:16,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707425510] [2022-01-18 16:17:16,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:16,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:17:16,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:16,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:17:16,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:17:16,293 INFO L87 Difference]: Start difference. First operand 486 states and 1001 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:20,183 INFO L93 Difference]: Finished difference Result 1280 states and 2550 transitions. [2022-01-18 16:17:20,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 16:17:20,184 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:20,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:20,185 INFO L225 Difference]: With dead ends: 1280 [2022-01-18 16:17:20,185 INFO L226 Difference]: Without dead ends: 1216 [2022-01-18 16:17:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5943 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1883, Invalid=17577, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:17:20,186 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 412 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:20,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 716 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2154 Invalid, 0 Unknown, 821 Unchecked, 0.7s Time] [2022-01-18 16:17:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-01-18 16:17:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 500. [2022-01-18 16:17:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0761523046092183) internal successors, (1036), 499 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1036 transitions. [2022-01-18 16:17:20,194 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1036 transitions. Word has length 33 [2022-01-18 16:17:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:20,194 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1036 transitions. [2022-01-18 16:17:20,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1036 transitions. [2022-01-18 16:17:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:20,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:20,195 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:20,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:20,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:20,410 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:20,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1405017264, now seen corresponding path program 36 times [2022-01-18 16:17:20,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:20,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962657745] [2022-01-18 16:17:20,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:20,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:20,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962657745] [2022-01-18 16:17:20,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962657745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778475080] [2022-01-18 16:17:20,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:20,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:20,625 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) [2022-01-18 16:17:20,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 16:17:20,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:17:20,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:20,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:20,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:20,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:21,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:21,559 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:21,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:21,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778475080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:21,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:21,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:21,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728775704] [2022-01-18 16:17:21,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:21,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:21,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:21,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:21,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:21,615 INFO L87 Difference]: Start difference. First operand 500 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:25,015 INFO L93 Difference]: Finished difference Result 1137 states and 2293 transitions. [2022-01-18 16:17:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:17:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:25,018 INFO L225 Difference]: With dead ends: 1137 [2022-01-18 16:17:25,019 INFO L226 Difference]: Without dead ends: 1109 [2022-01-18 16:17:25,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1412, Invalid=11244, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:17:25,020 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 322 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:25,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 702 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1794 Invalid, 0 Unknown, 850 Unchecked, 0.7s Time] [2022-01-18 16:17:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-18 16:17:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 493. [2022-01-18 16:17:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.071138211382114) internal successors, (1019), 492 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1019 transitions. [2022-01-18 16:17:25,029 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1019 transitions. Word has length 33 [2022-01-18 16:17:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:25,029 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1019 transitions. [2022-01-18 16:17:25,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:25,029 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1019 transitions. [2022-01-18 16:17:25,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:25,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:25,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:25,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 16:17:25,232 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,SelfDestructingSolverStorable41 [2022-01-18 16:17:25,232 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash 996112700, now seen corresponding path program 37 times [2022-01-18 16:17:25,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:25,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924035490] [2022-01-18 16:17:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:25,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:25,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:25,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924035490] [2022-01-18 16:17:25,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924035490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:25,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78355270] [2022-01-18 16:17:25,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:17:25,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:25,524 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) [2022-01-18 16:17:25,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 16:17:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:25,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:25,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:26,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:26,512 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:26,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:26,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78355270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:26,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:26,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:26,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515225060] [2022-01-18 16:17:26,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:26,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:26,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:26,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:26,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:26,568 INFO L87 Difference]: Start difference. First operand 493 states and 1019 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:27,608 INFO L93 Difference]: Finished difference Result 823 states and 1671 transitions. [2022-01-18 16:17:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:17:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:27,610 INFO L225 Difference]: With dead ends: 823 [2022-01-18 16:17:27,610 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 16:17:27,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=4045, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:17:27,610 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 501 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-01-18 16:17:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 16:17:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 492. [2022-01-18 16:17:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.069246435845214) internal successors, (1016), 491 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1016 transitions. [2022-01-18 16:17:27,616 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1016 transitions. Word has length 33 [2022-01-18 16:17:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:27,616 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1016 transitions. [2022-01-18 16:17:27,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1016 transitions. [2022-01-18 16:17:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:27,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:27,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:27,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:27,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:27,827 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1571949162, now seen corresponding path program 38 times [2022-01-18 16:17:27,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:27,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157864204] [2022-01-18 16:17:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:27,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:28,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157864204] [2022-01-18 16:17:28,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157864204] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055477510] [2022-01-18 16:17:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:17:28,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:28,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:28,120 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) [2022-01-18 16:17:28,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 16:17:28,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:17:28,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:28,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:28,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:28,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:28,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:29,117 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:29,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:29,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055477510] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:29,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:29,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:29,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113241499] [2022-01-18 16:17:29,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:29,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:29,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:29,176 INFO L87 Difference]: Start difference. First operand 492 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:30,548 INFO L93 Difference]: Finished difference Result 809 states and 1637 transitions. [2022-01-18 16:17:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:17:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:30,549 INFO L225 Difference]: With dead ends: 809 [2022-01-18 16:17:30,550 INFO L226 Difference]: Without dead ends: 759 [2022-01-18 16:17:30,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=475, Invalid=4927, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:17:30,550 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:30,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 588 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 541 Unchecked, 0.4s Time] [2022-01-18 16:17:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-18 16:17:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 491. [2022-01-18 16:17:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0673469387755103) internal successors, (1013), 490 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1013 transitions. [2022-01-18 16:17:30,557 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1013 transitions. Word has length 33 [2022-01-18 16:17:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:30,557 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1013 transitions. [2022-01-18 16:17:30,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1013 transitions. [2022-01-18 16:17:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:30,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:30,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:30,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:30,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:30,771 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732976, now seen corresponding path program 39 times [2022-01-18 16:17:30,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:30,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481773568] [2022-01-18 16:17:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:30,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:31,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481773568] [2022-01-18 16:17:31,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481773568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:31,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867943461] [2022-01-18 16:17:31,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:17:31,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:31,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:31,131 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:31,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 16:17:31,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:17:31,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:31,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:31,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:31,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:31,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:31,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:32,098 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:32,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:32,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867943461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:32,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:32,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:32,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642308908] [2022-01-18 16:17:32,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:32,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:32,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:32,159 INFO L87 Difference]: Start difference. First operand 491 states and 1013 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:33,551 INFO L93 Difference]: Finished difference Result 951 states and 1937 transitions. [2022-01-18 16:17:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:17:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:33,552 INFO L225 Difference]: With dead ends: 951 [2022-01-18 16:17:33,552 INFO L226 Difference]: Without dead ends: 923 [2022-01-18 16:17:33,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:17:33,553 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:33,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 547 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1725 Invalid, 0 Unknown, 257 Unchecked, 0.6s Time] [2022-01-18 16:17:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-01-18 16:17:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 494. [2022-01-18 16:17:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.0649087221095335) internal successors, (1018), 493 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1018 transitions. [2022-01-18 16:17:33,561 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1018 transitions. Word has length 33 [2022-01-18 16:17:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:33,561 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1018 transitions. [2022-01-18 16:17:33,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1018 transitions. [2022-01-18 16:17:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:33,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:33,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:33,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:33,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-18 16:17:33,787 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash -11051816, now seen corresponding path program 40 times [2022-01-18 16:17:33,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:33,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545044710] [2022-01-18 16:17:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:33,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:34,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545044710] [2022-01-18 16:17:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545044710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653182272] [2022-01-18 16:17:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:17:34,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:34,100 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:34,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 16:17:34,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:17:34,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:34,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:34,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:34,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:34,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653182272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:34,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:34,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:34,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11875306] [2022-01-18 16:17:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:34,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:34,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:34,815 INFO L87 Difference]: Start difference. First operand 494 states and 1018 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:36,364 INFO L93 Difference]: Finished difference Result 863 states and 1703 transitions. [2022-01-18 16:17:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:17:36,364 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:36,365 INFO L225 Difference]: With dead ends: 863 [2022-01-18 16:17:36,365 INFO L226 Difference]: Without dead ends: 796 [2022-01-18 16:17:36,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=6101, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:17:36,366 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:36,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 682 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1611 Invalid, 0 Unknown, 639 Unchecked, 0.5s Time] [2022-01-18 16:17:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-01-18 16:17:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 520. [2022-01-18 16:17:36,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-01-18 16:17:36,372 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-01-18 16:17:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:36,372 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-01-18 16:17:36,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-01-18 16:17:36,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:36,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:36,373 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:36,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 16:17:36,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 16:17:36,588 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:36,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1816969572, now seen corresponding path program 41 times [2022-01-18 16:17:36,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:36,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110866588] [2022-01-18 16:17:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:36,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:36,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110866588] [2022-01-18 16:17:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110866588] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:36,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518160236] [2022-01-18 16:17:36,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:17:36,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:36,848 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:36,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 16:17:36,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:17:36,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:17:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:37,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:37,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:37,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:17:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:37,537 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:37,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518160236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:37,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:37,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:37,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968022236] [2022-01-18 16:17:37,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:37,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:37,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:37,574 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:38,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:38,819 INFO L93 Difference]: Finished difference Result 871 states and 1735 transitions. [2022-01-18 16:17:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:17:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:38,821 INFO L225 Difference]: With dead ends: 871 [2022-01-18 16:17:38,821 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 16:17:38,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=5367, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:17:38,822 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:38,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 633 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1758 Invalid, 0 Unknown, 255 Unchecked, 0.5s Time] [2022-01-18 16:17:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 16:17:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 516. [2022-01-18 16:17:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-01-18 16:17:38,828 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-01-18 16:17:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:38,828 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-01-18 16:17:38,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-01-18 16:17:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:38,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:38,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:38,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:39,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 16:17:39,044 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:39,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash -689184002, now seen corresponding path program 42 times [2022-01-18 16:17:39,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323556239] [2022-01-18 16:17:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:39,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:39,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323556239] [2022-01-18 16:17:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323556239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6241225] [2022-01-18 16:17:39,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:39,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:39,359 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:39,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 16:17:39,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:17:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:39,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:17:39,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:39,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:39,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:40,348 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:40,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:40,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6241225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:40,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:40,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:40,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988187494] [2022-01-18 16:17:40,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:40,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:40,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:40,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:40,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:40,403 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:41,939 INFO L93 Difference]: Finished difference Result 859 states and 1715 transitions. [2022-01-18 16:17:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:17:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:41,941 INFO L225 Difference]: With dead ends: 859 [2022-01-18 16:17:41,941 INFO L226 Difference]: Without dead ends: 824 [2022-01-18 16:17:41,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=473, Invalid=5227, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:17:41,942 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:41,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 496 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1118 Invalid, 0 Unknown, 400 Unchecked, 0.4s Time] [2022-01-18 16:17:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-18 16:17:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 526. [2022-01-18 16:17:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.041904761904762) internal successors, (1072), 525 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1072 transitions. [2022-01-18 16:17:41,948 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1072 transitions. Word has length 33 [2022-01-18 16:17:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:41,949 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1072 transitions. [2022-01-18 16:17:41,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1072 transitions. [2022-01-18 16:17:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:41,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:41,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:41,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:42,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:42,163 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash -477014994, now seen corresponding path program 43 times [2022-01-18 16:17:42,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:42,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068468381] [2022-01-18 16:17:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:42,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:42,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:42,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068468381] [2022-01-18 16:17:42,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068468381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455723867] [2022-01-18 16:17:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:17:42,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:42,440 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:42,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 16:17:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:42,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:42,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:42,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:43,181 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:43,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:43,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455723867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:43,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:43,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:43,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174058065] [2022-01-18 16:17:43,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:43,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:43,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:43,235 INFO L87 Difference]: Start difference. First operand 526 states and 1072 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:44,905 INFO L93 Difference]: Finished difference Result 822 states and 1634 transitions. [2022-01-18 16:17:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:17:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:44,906 INFO L225 Difference]: With dead ends: 822 [2022-01-18 16:17:44,906 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 16:17:44,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=489, Invalid=5363, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:17:44,907 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 216 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:44,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 553 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1311 Invalid, 0 Unknown, 524 Unchecked, 0.5s Time] [2022-01-18 16:17:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 16:17:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 516. [2022-01-18 16:17:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-01-18 16:17:44,913 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-01-18 16:17:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:44,913 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-01-18 16:17:44,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-01-18 16:17:44,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:44,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:44,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:44,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 16:17:45,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 16:17:45,129 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:45,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1268319898, now seen corresponding path program 44 times [2022-01-18 16:17:45,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:45,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661039758] [2022-01-18 16:17:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:45,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:45,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661039758] [2022-01-18 16:17:45,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661039758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:45,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082184724] [2022-01-18 16:17:45,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:17:45,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:45,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:45,405 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:45,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 16:17:45,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:17:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:45,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:45,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:46,398 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:46,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:46,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082184724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:46,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:46,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:46,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128684219] [2022-01-18 16:17:46,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:46,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:46,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:46,452 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:48,308 INFO L93 Difference]: Finished difference Result 773 states and 1559 transitions. [2022-01-18 16:17:48,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:17:48,308 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:48,309 INFO L225 Difference]: With dead ends: 773 [2022-01-18 16:17:48,309 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 16:17:48,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:17:48,310 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 183 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:48,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 595 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1574 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-01-18 16:17:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 16:17:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 516. [2022-01-18 16:17:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0524271844660196) internal successors, (1057), 515 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1057 transitions. [2022-01-18 16:17:48,316 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1057 transitions. Word has length 33 [2022-01-18 16:17:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:48,316 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1057 transitions. [2022-01-18 16:17:48,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1057 transitions. [2022-01-18 16:17:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:48,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:48,317 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:48,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-18 16:17:48,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 16:17:48,517 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1641024808, now seen corresponding path program 45 times [2022-01-18 16:17:48,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:48,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843217840] [2022-01-18 16:17:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:48,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:48,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843217840] [2022-01-18 16:17:48,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843217840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932892944] [2022-01-18 16:17:48,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:17:48,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:48,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:48,807 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:48,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 16:17:48,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:17:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:48,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:48,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:49,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:49,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:49,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:49,810 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:49,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:49,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932892944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:49,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:49,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:49,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125135067] [2022-01-18 16:17:49,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:49,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:49,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:49,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:49,868 INFO L87 Difference]: Start difference. First operand 516 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:51,609 INFO L93 Difference]: Finished difference Result 1126 states and 2249 transitions. [2022-01-18 16:17:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:17:51,609 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:51,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:51,611 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 16:17:51,611 INFO L226 Difference]: Without dead ends: 1046 [2022-01-18 16:17:51,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=763, Invalid=8167, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 16:17:51,612 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 265 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:51,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 621 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1297 Invalid, 0 Unknown, 975 Unchecked, 0.4s Time] [2022-01-18 16:17:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-01-18 16:17:51,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 520. [2022-01-18 16:17:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-01-18 16:17:51,632 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-01-18 16:17:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:51,632 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-01-18 16:17:51,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:51,632 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-01-18 16:17:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:51,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:51,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:51,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:51,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:51,861 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash -855893032, now seen corresponding path program 46 times [2022-01-18 16:17:51,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:51,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385365505] [2022-01-18 16:17:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:51,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:52,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:52,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385365505] [2022-01-18 16:17:52,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385365505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:52,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289576846] [2022-01-18 16:17:52,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:17:52,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:52,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:52,075 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:52,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 16:17:52,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:17:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:17:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:52,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:52,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:17:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:52,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:52,761 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:52,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:52,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289576846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:52,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:52,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:52,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104891269] [2022-01-18 16:17:52,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:52,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:52,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:52,810 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:56,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:56,127 INFO L93 Difference]: Finished difference Result 1128 states and 2270 transitions. [2022-01-18 16:17:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:17:56,128 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:56,129 INFO L225 Difference]: With dead ends: 1128 [2022-01-18 16:17:56,129 INFO L226 Difference]: Without dead ends: 1100 [2022-01-18 16:17:56,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1219, Invalid=9911, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 16:17:56,130 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 366 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1096 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:56,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 697 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1673 Invalid, 0 Unknown, 1096 Unchecked, 0.6s Time] [2022-01-18 16:17:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-01-18 16:17:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 512. [2022-01-18 16:17:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.0469667318982387) internal successors, (1046), 511 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1046 transitions. [2022-01-18 16:17:56,169 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1046 transitions. Word has length 33 [2022-01-18 16:17:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:56,169 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1046 transitions. [2022-01-18 16:17:56,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1046 transitions. [2022-01-18 16:17:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:56,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:56,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:56,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:56,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 16:17:56,384 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:56,385 INFO L85 PathProgramCache]: Analyzing trace with hash 161649500, now seen corresponding path program 47 times [2022-01-18 16:17:56,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:56,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533658107] [2022-01-18 16:17:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:56,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:56,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533658107] [2022-01-18 16:17:56,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533658107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:56,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385432567] [2022-01-18 16:17:56,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:17:56,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:56,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:56,677 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:56,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 16:17:56,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:17:56,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:17:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:57,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:17:57,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:17:57,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:17:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:57,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:17:57,634 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:17:57,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:17:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:57,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385432567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:17:57,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:17:57,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:17:57,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142574363] [2022-01-18 16:17:57,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:17:57,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:17:57,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:17:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:17:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:17:57,694 INFO L87 Difference]: Start difference. First operand 512 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:17:59,407 INFO L93 Difference]: Finished difference Result 842 states and 1670 transitions. [2022-01-18 16:17:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:17:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:17:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:17:59,409 INFO L225 Difference]: With dead ends: 842 [2022-01-18 16:17:59,409 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 16:17:59,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=497, Invalid=5665, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:17:59,409 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:17:59,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 697 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1550 Invalid, 0 Unknown, 561 Unchecked, 0.6s Time] [2022-01-18 16:17:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 16:17:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 501. [2022-01-18 16:17:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.046) internal successors, (1023), 500 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1023 transitions. [2022-01-18 16:17:59,415 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1023 transitions. Word has length 33 [2022-01-18 16:17:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:17:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1023 transitions. [2022-01-18 16:17:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:17:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1023 transitions. [2022-01-18 16:17:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:17:59,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:17:59,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:17:59,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 16:17:59,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:59,639 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:17:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:17:59,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1448719524, now seen corresponding path program 48 times [2022-01-18 16:17:59,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:17:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243172778] [2022-01-18 16:17:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:17:59,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:17:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:17:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:17:59,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:17:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243172778] [2022-01-18 16:17:59,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243172778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:17:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308832049] [2022-01-18 16:17:59,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:17:59,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:17:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:17:59,840 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:17:59,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:17:59,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:17:59,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:17:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:17:59,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 16:18:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:00,196 INFO L353 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2022-01-18 16:18:00,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 16:18:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:00,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:01,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:01,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:01,042 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:18:01,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:18:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:01,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308832049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:01,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:01,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 52 [2022-01-18 16:18:01,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609055211] [2022-01-18 16:18:01,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-18 16:18:01,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-18 16:18:01,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2022-01-18 16:18:01,119 INFO L87 Difference]: Start difference. First operand 501 states and 1023 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:04,669 INFO L93 Difference]: Finished difference Result 876 states and 1742 transitions. [2022-01-18 16:18:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 16:18:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:04,670 INFO L225 Difference]: With dead ends: 876 [2022-01-18 16:18:04,670 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 16:18:04,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1657, Invalid=12863, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 16:18:04,699 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 360 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:04,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 626 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1915 Invalid, 0 Unknown, 607 Unchecked, 0.7s Time] [2022-01-18 16:18:04,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 16:18:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 492. [2022-01-18 16:18:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0590631364562118) internal successors, (1011), 491 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1011 transitions. [2022-01-18 16:18:04,705 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1011 transitions. Word has length 33 [2022-01-18 16:18:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:04,705 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1011 transitions. [2022-01-18 16:18:04,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1011 transitions. [2022-01-18 16:18:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:04,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:04,706 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:04,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:04,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-01-18 16:18:04,921 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash -790191306, now seen corresponding path program 49 times [2022-01-18 16:18:04,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:04,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952139312] [2022-01-18 16:18:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:04,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:05,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952139312] [2022-01-18 16:18:05,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952139312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103074468] [2022-01-18 16:18:05,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:18:05,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:05,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:05,199 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:05,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 16:18:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:05,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:05,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:05,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:06,185 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:06,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:06,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103074468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:06,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:06,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:06,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160960812] [2022-01-18 16:18:06,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:06,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:06,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:06,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:06,252 INFO L87 Difference]: Start difference. First operand 492 states and 1011 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:08,000 INFO L93 Difference]: Finished difference Result 967 states and 1947 transitions. [2022-01-18 16:18:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:18:08,001 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:08,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:08,002 INFO L225 Difference]: With dead ends: 967 [2022-01-18 16:18:08,002 INFO L226 Difference]: Without dead ends: 948 [2022-01-18 16:18:08,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=690, Invalid=6966, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:18:08,003 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 568 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1182 Invalid, 0 Unknown, 727 Unchecked, 0.4s Time] [2022-01-18 16:18:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-01-18 16:18:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 519. [2022-01-18 16:18:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.0463320463320462) internal successors, (1060), 518 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1060 transitions. [2022-01-18 16:18:08,009 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1060 transitions. Word has length 33 [2022-01-18 16:18:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:08,009 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1060 transitions. [2022-01-18 16:18:08,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1060 transitions. [2022-01-18 16:18:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:08,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:08,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:08,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:08,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-01-18 16:18:08,225 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1059334192, now seen corresponding path program 50 times [2022-01-18 16:18:08,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:08,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530432796] [2022-01-18 16:18:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:08,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:08,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530432796] [2022-01-18 16:18:08,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530432796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766501490] [2022-01-18 16:18:08,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:18:08,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:08,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:08,503 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:08,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 16:18:08,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:18:08,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:08,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:08,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:08,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:09,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:09,442 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:09,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:09,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766501490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:09,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:09,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:09,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263562235] [2022-01-18 16:18:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:09,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:09,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:09,491 INFO L87 Difference]: Start difference. First operand 519 states and 1060 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:11,407 INFO L93 Difference]: Finished difference Result 755 states and 1523 transitions. [2022-01-18 16:18:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:18:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:11,408 INFO L225 Difference]: With dead ends: 755 [2022-01-18 16:18:11,408 INFO L226 Difference]: Without dead ends: 714 [2022-01-18 16:18:11,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=613, Invalid=6193, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:18:11,409 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:11,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 641 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1735 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-01-18 16:18:11,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-18 16:18:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 492. [2022-01-18 16:18:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0570264765784114) internal successors, (1010), 491 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1010 transitions. [2022-01-18 16:18:11,425 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1010 transitions. Word has length 33 [2022-01-18 16:18:11,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:11,425 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1010 transitions. [2022-01-18 16:18:11,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1010 transitions. [2022-01-18 16:18:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:11,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:11,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:11,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:11,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:11,626 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2088128440, now seen corresponding path program 51 times [2022-01-18 16:18:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:11,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790196528] [2022-01-18 16:18:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:11,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:11,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790196528] [2022-01-18 16:18:11,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790196528] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:11,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842881523] [2022-01-18 16:18:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:18:11,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:11,823 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:11,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 16:18:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:18:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:11,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:12,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:12,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:12,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:12,838 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:12,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:12,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842881523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:12,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:12,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:12,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007821228] [2022-01-18 16:18:12,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:12,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:12,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:12,911 INFO L87 Difference]: Start difference. First operand 492 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:15,447 INFO L93 Difference]: Finished difference Result 1126 states and 2253 transitions. [2022-01-18 16:18:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:18:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:15,449 INFO L225 Difference]: With dead ends: 1126 [2022-01-18 16:18:15,449 INFO L226 Difference]: Without dead ends: 1050 [2022-01-18 16:18:15,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=763, Invalid=8357, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:18:15,450 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 284 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:15,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 746 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2080 Invalid, 0 Unknown, 873 Unchecked, 0.8s Time] [2022-01-18 16:18:15,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-18 16:18:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 486. [2022-01-18 16:18:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.051546391752577) internal successors, (995), 485 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 995 transitions. [2022-01-18 16:18:15,456 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 995 transitions. Word has length 33 [2022-01-18 16:18:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:15,456 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 995 transitions. [2022-01-18 16:18:15,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 995 transitions. [2022-01-18 16:18:15,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:15,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:15,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:15,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:15,672 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1545236932, now seen corresponding path program 52 times [2022-01-18 16:18:15,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582546629] [2022-01-18 16:18:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:15,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:15,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:15,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582546629] [2022-01-18 16:18:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582546629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:15,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367763845] [2022-01-18 16:18:15,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:18:15,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:15,943 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:15,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 16:18:15,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:18:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:16,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:16,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:16,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:16,935 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:16,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367763845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:17,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:17,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:17,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945323141] [2022-01-18 16:18:17,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:17,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:17,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:17,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:17,003 INFO L87 Difference]: Start difference. First operand 486 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:18,567 INFO L93 Difference]: Finished difference Result 715 states and 1446 transitions. [2022-01-18 16:18:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:18:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:18,568 INFO L225 Difference]: With dead ends: 715 [2022-01-18 16:18:18,568 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 16:18:18,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:18:18,569 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:18,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 597 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1462 Invalid, 0 Unknown, 341 Unchecked, 0.5s Time] [2022-01-18 16:18:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 16:18:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 497. [2022-01-18 16:18:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0463709677419355) internal successors, (1015), 496 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1015 transitions. [2022-01-18 16:18:18,574 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1015 transitions. Word has length 33 [2022-01-18 16:18:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:18,574 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1015 transitions. [2022-01-18 16:18:18,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1015 transitions. [2022-01-18 16:18:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:18,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:18,575 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:18,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:18,775 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash 768850960, now seen corresponding path program 53 times [2022-01-18 16:18:18,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043374722] [2022-01-18 16:18:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:18,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:18,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043374722] [2022-01-18 16:18:18,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043374722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114174158] [2022-01-18 16:18:18,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:18:18,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:18,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:18,998 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:18,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 16:18:19,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:18:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:19,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:19,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:19,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:19,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:18:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:19,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:20,114 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:20,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:18:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114174158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:20,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:18:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964490622] [2022-01-18 16:18:20,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:18:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:18:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:18:20,172 INFO L87 Difference]: Start difference. First operand 497 states and 1015 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:21,656 INFO L93 Difference]: Finished difference Result 822 states and 1660 transitions. [2022-01-18 16:18:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:18:21,660 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:21,662 INFO L225 Difference]: With dead ends: 822 [2022-01-18 16:18:21,662 INFO L226 Difference]: Without dead ends: 773 [2022-01-18 16:18:21,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=526, Invalid=5954, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:18:21,663 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:21,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 571 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1827 Invalid, 0 Unknown, 468 Unchecked, 0.5s Time] [2022-01-18 16:18:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-18 16:18:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 488. [2022-01-18 16:18:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.051334702258727) internal successors, (999), 487 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 999 transitions. [2022-01-18 16:18:21,668 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 999 transitions. Word has length 33 [2022-01-18 16:18:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 999 transitions. [2022-01-18 16:18:21,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 999 transitions. [2022-01-18 16:18:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:21,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:21,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:21,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 16:18:21,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 16:18:21,884 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1364107774, now seen corresponding path program 54 times [2022-01-18 16:18:21,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:21,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371449378] [2022-01-18 16:18:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:21,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:22,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371449378] [2022-01-18 16:18:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371449378] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656797669] [2022-01-18 16:18:22,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:18:22,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:22,139 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:22,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:18:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:22,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 16:18:22,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:22,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:22,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:22,877 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:22,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:22,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656797669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:22,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:22,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264795561] [2022-01-18 16:18:22,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:22,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:22,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:22,911 INFO L87 Difference]: Start difference. First operand 488 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:24,498 INFO L93 Difference]: Finished difference Result 762 states and 1540 transitions. [2022-01-18 16:18:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:18:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:24,499 INFO L225 Difference]: With dead ends: 762 [2022-01-18 16:18:24,499 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 16:18:24,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=552, Invalid=5610, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:18:24,500 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:24,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 457 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1137 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2022-01-18 16:18:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 16:18:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 490. [2022-01-18 16:18:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.051124744376278) internal successors, (1003), 489 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1003 transitions. [2022-01-18 16:18:24,511 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1003 transitions. Word has length 33 [2022-01-18 16:18:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:24,511 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1003 transitions. [2022-01-18 16:18:24,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1003 transitions. [2022-01-18 16:18:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:24,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:24,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:24,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:24,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-01-18 16:18:24,727 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -253325246, now seen corresponding path program 55 times [2022-01-18 16:18:24,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601081155] [2022-01-18 16:18:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:24,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:25,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601081155] [2022-01-18 16:18:25,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601081155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:25,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173030374] [2022-01-18 16:18:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:18:25,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:25,024 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:25,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 16:18:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:25,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:25,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:25,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:25,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:25,886 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:25,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:25,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173030374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:25,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:25,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:25,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944986611] [2022-01-18 16:18:25,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:25,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:25,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:25,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:25,941 INFO L87 Difference]: Start difference. First operand 490 states and 1003 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:27,512 INFO L93 Difference]: Finished difference Result 867 states and 1755 transitions. [2022-01-18 16:18:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:18:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:27,514 INFO L225 Difference]: With dead ends: 867 [2022-01-18 16:18:27,514 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 16:18:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=573, Invalid=5747, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:18:27,514 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 189 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:27,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 586 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2102 Invalid, 0 Unknown, 312 Unchecked, 0.6s Time] [2022-01-18 16:18:27,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 16:18:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 491. [2022-01-18 16:18:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-01-18 16:18:27,520 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-01-18 16:18:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:27,520 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-01-18 16:18:27,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-01-18 16:18:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:27,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:27,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:27,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:27,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:27,727 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2005218364, now seen corresponding path program 56 times [2022-01-18 16:18:27,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040920151] [2022-01-18 16:18:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:27,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:27,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040920151] [2022-01-18 16:18:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040920151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832324621] [2022-01-18 16:18:27,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:18:27,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:27,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:27,941 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:27,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 16:18:27,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:18:27,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:28,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:28,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:28,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:28,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:28,619 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:28,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:28,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832324621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:28,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:28,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:28,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446122064] [2022-01-18 16:18:28,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:28,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:28,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:28,653 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:30,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:30,070 INFO L93 Difference]: Finished difference Result 1006 states and 2031 transitions. [2022-01-18 16:18:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:18:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:30,072 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 16:18:30,072 INFO L226 Difference]: Without dead ends: 974 [2022-01-18 16:18:30,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:18:30,073 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:30,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 480 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1387 Invalid, 0 Unknown, 310 Unchecked, 0.4s Time] [2022-01-18 16:18:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-01-18 16:18:30,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 505. [2022-01-18 16:18:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-01-18 16:18:30,080 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-01-18 16:18:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:30,081 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-01-18 16:18:30,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-01-18 16:18:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:30,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:30,081 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:30,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:30,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:30,296 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -578975998, now seen corresponding path program 57 times [2022-01-18 16:18:30,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:30,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570327010] [2022-01-18 16:18:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:30,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:30,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570327010] [2022-01-18 16:18:30,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570327010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:30,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30397297] [2022-01-18 16:18:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:18:30,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:30,472 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:30,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 16:18:30,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:18:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:30,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:30,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:31,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:31,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30397297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:31,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:31,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:31,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536880412] [2022-01-18 16:18:31,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:31,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:31,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:31,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:31,234 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:34,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:34,337 INFO L93 Difference]: Finished difference Result 1070 states and 2154 transitions. [2022-01-18 16:18:34,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 16:18:34,338 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:34,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:34,339 INFO L225 Difference]: With dead ends: 1070 [2022-01-18 16:18:34,339 INFO L226 Difference]: Without dead ends: 1038 [2022-01-18 16:18:34,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1130, Invalid=9790, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:18:34,340 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 276 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:34,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 485 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1601 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2022-01-18 16:18:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-18 16:18:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 487. [2022-01-18 16:18:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.051440329218107) internal successors, (997), 486 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 997 transitions. [2022-01-18 16:18:34,346 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 997 transitions. Word has length 33 [2022-01-18 16:18:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:34,346 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 997 transitions. [2022-01-18 16:18:34,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 997 transitions. [2022-01-18 16:18:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:34,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:34,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:34,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:34,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:34,561 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:34,562 INFO L85 PathProgramCache]: Analyzing trace with hash 2121073394, now seen corresponding path program 58 times [2022-01-18 16:18:34,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:34,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882478729] [2022-01-18 16:18:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:34,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:34,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882478729] [2022-01-18 16:18:34,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882478729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98997762] [2022-01-18 16:18:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:18:34,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:34,834 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:34,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 16:18:34,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:18:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:35,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:35,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:35,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:35,837 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:35,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:35,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98997762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:35,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:35,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:35,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917847820] [2022-01-18 16:18:35,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:35,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:35,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:35,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:35,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:35,887 INFO L87 Difference]: Start difference. First operand 487 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:37,429 INFO L93 Difference]: Finished difference Result 767 states and 1532 transitions. [2022-01-18 16:18:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:18:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:37,430 INFO L225 Difference]: With dead ends: 767 [2022-01-18 16:18:37,430 INFO L226 Difference]: Without dead ends: 683 [2022-01-18 16:18:37,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=506, Invalid=5500, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:18:37,430 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 195 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:37,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 500 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1473 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-01-18 16:18:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-18 16:18:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 491. [2022-01-18 16:18:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-01-18 16:18:37,435 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-01-18 16:18:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:37,435 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-01-18 16:18:37,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-01-18 16:18:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:37,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:37,436 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:37,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:37,651 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:37,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1479962804, now seen corresponding path program 59 times [2022-01-18 16:18:37,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:37,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879352688] [2022-01-18 16:18:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:37,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879352688] [2022-01-18 16:18:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879352688] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:37,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443495946] [2022-01-18 16:18:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:18:37,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:37,921 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 16:18:37,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:18:37,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:18:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:38,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:38,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:38,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:39,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:18:39,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 16:18:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:39,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443495946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:39,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:39,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-01-18 16:18:39,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167755983] [2022-01-18 16:18:39,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:18:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:18:39,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:18:39,103 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:43,997 INFO L93 Difference]: Finished difference Result 1473 states and 2923 transitions. [2022-01-18 16:18:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-18 16:18:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:43,998 INFO L225 Difference]: With dead ends: 1473 [2022-01-18 16:18:43,998 INFO L226 Difference]: Without dead ends: 1313 [2022-01-18 16:18:44,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2435, Invalid=19321, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:18:44,000 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:44,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 818 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2700 Invalid, 0 Unknown, 515 Unchecked, 1.1s Time] [2022-01-18 16:18:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-01-18 16:18:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 511. [2022-01-18 16:18:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.052941176470588) internal successors, (1047), 510 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1047 transitions. [2022-01-18 16:18:44,007 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1047 transitions. Word has length 33 [2022-01-18 16:18:44,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:44,008 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1047 transitions. [2022-01-18 16:18:44,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:44,008 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1047 transitions. [2022-01-18 16:18:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:44,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:44,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:44,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:44,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 16:18:44,223 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1388762126, now seen corresponding path program 60 times [2022-01-18 16:18:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697589162] [2022-01-18 16:18:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:44,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697589162] [2022-01-18 16:18:44,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697589162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46574560] [2022-01-18 16:18:44,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:18:44,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:44,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:44,456 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:44,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 16:18:44,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:18:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:18:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:44,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:18:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:44,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:45,366 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:45,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:45,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46574560] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:45,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:45,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:45,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751221356] [2022-01-18 16:18:45,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:45,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:45,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:45,414 INFO L87 Difference]: Start difference. First operand 511 states and 1047 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:47,952 INFO L93 Difference]: Finished difference Result 1016 states and 2049 transitions. [2022-01-18 16:18:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:18:47,952 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:47,953 INFO L225 Difference]: With dead ends: 1016 [2022-01-18 16:18:47,953 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 16:18:47,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1071, Invalid=9641, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 16:18:47,954 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 292 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:47,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 466 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1723 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-01-18 16:18:47,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 16:18:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 506. [2022-01-18 16:18:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0514851485148515) internal successors, (1036), 505 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1036 transitions. [2022-01-18 16:18:47,960 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1036 transitions. Word has length 33 [2022-01-18 16:18:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:47,960 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1036 transitions. [2022-01-18 16:18:47,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1036 transitions. [2022-01-18 16:18:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:47,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:47,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:47,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:48,175 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1493608744, now seen corresponding path program 61 times [2022-01-18 16:18:48,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389290382] [2022-01-18 16:18:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:48,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:48,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389290382] [2022-01-18 16:18:48,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389290382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:48,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839298306] [2022-01-18 16:18:48,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:18:48,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:48,445 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:48,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 16:18:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:48,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:48,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:48,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:48,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:49,407 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:49,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:49,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839298306] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:49,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:49,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:49,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424228335] [2022-01-18 16:18:49,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:49,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:49,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:49,459 INFO L87 Difference]: Start difference. First operand 506 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:51,297 INFO L93 Difference]: Finished difference Result 935 states and 1895 transitions. [2022-01-18 16:18:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:18:51,297 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:51,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:51,298 INFO L225 Difference]: With dead ends: 935 [2022-01-18 16:18:51,298 INFO L226 Difference]: Without dead ends: 907 [2022-01-18 16:18:51,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=545, Invalid=5461, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:18:51,299 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:51,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 599 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2061 Invalid, 0 Unknown, 350 Unchecked, 0.7s Time] [2022-01-18 16:18:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-01-18 16:18:51,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 498. [2022-01-18 16:18:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.052313883299799) internal successors, (1020), 497 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1020 transitions. [2022-01-18 16:18:51,305 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1020 transitions. Word has length 33 [2022-01-18 16:18:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:51,305 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1020 transitions. [2022-01-18 16:18:51,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1020 transitions. [2022-01-18 16:18:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:51,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:51,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:51,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:51,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 16:18:51,513 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 983015062, now seen corresponding path program 62 times [2022-01-18 16:18:51,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:51,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739317525] [2022-01-18 16:18:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:51,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:51,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:51,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739317525] [2022-01-18 16:18:51,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739317525] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:51,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397520120] [2022-01-18 16:18:51,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:18:51,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:51,803 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:51,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 16:18:51,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:18:51,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:52,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:52,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:52,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:52,665 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:52,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:52,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397520120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:52,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:52,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:52,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686883816] [2022-01-18 16:18:52,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:52,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:52,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:52,704 INFO L87 Difference]: Start difference. First operand 498 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:54,051 INFO L93 Difference]: Finished difference Result 711 states and 1434 transitions. [2022-01-18 16:18:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:18:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:54,052 INFO L225 Difference]: With dead ends: 711 [2022-01-18 16:18:54,052 INFO L226 Difference]: Without dead ends: 669 [2022-01-18 16:18:54,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=5470, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:18:54,052 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:54,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 482 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1407 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-01-18 16:18:54,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-01-18 16:18:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 505. [2022-01-18 16:18:54,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0456349206349205) internal successors, (1031), 504 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1031 transitions. [2022-01-18 16:18:54,058 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1031 transitions. Word has length 33 [2022-01-18 16:18:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:54,058 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1031 transitions. [2022-01-18 16:18:54,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1031 transitions. [2022-01-18 16:18:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:54,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:54,059 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:54,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:54,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 16:18:54,271 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash 206629090, now seen corresponding path program 63 times [2022-01-18 16:18:54,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:54,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405448018] [2022-01-18 16:18:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:54,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:54,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405448018] [2022-01-18 16:18:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405448018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126155746] [2022-01-18 16:18:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:18:54,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:54,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:54,562 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:54,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 16:18:54,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:18:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:54,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:54,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:55,463 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:55,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:55,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126155746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:55,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:55,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:55,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599468932] [2022-01-18 16:18:55,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:55,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:55,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:55,499 INFO L87 Difference]: Start difference. First operand 505 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:18:56,730 INFO L93 Difference]: Finished difference Result 771 states and 1553 transitions. [2022-01-18 16:18:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:18:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:18:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:18:56,730 INFO L225 Difference]: With dead ends: 771 [2022-01-18 16:18:56,730 INFO L226 Difference]: Without dead ends: 754 [2022-01-18 16:18:56,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:18:56,731 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:18:56,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 419 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1271 Invalid, 0 Unknown, 363 Unchecked, 0.3s Time] [2022-01-18 16:18:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-18 16:18:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 501. [2022-01-18 16:18:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.05) internal successors, (1025), 500 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1025 transitions. [2022-01-18 16:18:56,737 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1025 transitions. Word has length 33 [2022-01-18 16:18:56,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:18:56,737 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1025 transitions. [2022-01-18 16:18:56,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:18:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1025 transitions. [2022-01-18 16:18:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:18:56,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:18:56,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:18:56,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-01-18 16:18:56,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 16:18:56,952 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:18:56,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:18:56,952 INFO L85 PathProgramCache]: Analyzing trace with hash 690032350, now seen corresponding path program 64 times [2022-01-18 16:18:56,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:18:56,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535212286] [2022-01-18 16:18:56,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:18:56,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:18:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:18:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:57,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:18:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535212286] [2022-01-18 16:18:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535212286] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:18:57,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164513477] [2022-01-18 16:18:57,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:18:57,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:18:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:18:57,224 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:18:57,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 16:18:57,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:18:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:18:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:18:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:18:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:18:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:18:57,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:18:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:57,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:18:58,197 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:18:58,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:18:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:18:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164513477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:18:58,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:18:58,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:18:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73648608] [2022-01-18 16:18:58,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:18:58,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:18:58,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:18:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:18:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:18:58,248 INFO L87 Difference]: Start difference. First operand 501 states and 1025 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:00,135 INFO L93 Difference]: Finished difference Result 779 states and 1573 transitions. [2022-01-18 16:19:00,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:19:00,135 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:00,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:00,136 INFO L225 Difference]: With dead ends: 779 [2022-01-18 16:19:00,136 INFO L226 Difference]: Without dead ends: 740 [2022-01-18 16:19:00,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:19:00,137 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:00,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 619 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1900 Invalid, 0 Unknown, 299 Unchecked, 0.7s Time] [2022-01-18 16:19:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-18 16:19:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 499. [2022-01-18 16:19:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0522088353413657) internal successors, (1022), 498 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1022 transitions. [2022-01-18 16:19:00,142 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1022 transitions. Word has length 33 [2022-01-18 16:19:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:00,142 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1022 transitions. [2022-01-18 16:19:00,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1022 transitions. [2022-01-18 16:19:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:00,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:00,143 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:00,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:00,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 16:19:00,343 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1926329644, now seen corresponding path program 65 times [2022-01-18 16:19:00,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:00,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099783409] [2022-01-18 16:19:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:00,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:00,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:00,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099783409] [2022-01-18 16:19:00,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099783409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:00,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483088271] [2022-01-18 16:19:00,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:19:00,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:00,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:00,564 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:00,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 16:19:00,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:19:00,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:00,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:19:00,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:00,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:00,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:19:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:00,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:01,293 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:01,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:01,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483088271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:01,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:01,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:01,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038081107] [2022-01-18 16:19:01,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:01,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:01,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:01,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:01,347 INFO L87 Difference]: Start difference. First operand 499 states and 1022 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:03,450 INFO L93 Difference]: Finished difference Result 688 states and 1386 transitions. [2022-01-18 16:19:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:19:03,450 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:03,451 INFO L225 Difference]: With dead ends: 688 [2022-01-18 16:19:03,451 INFO L226 Difference]: Without dead ends: 644 [2022-01-18 16:19:03,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=569, Invalid=5751, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:19:03,451 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:03,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 511 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1427 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-01-18 16:19:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-01-18 16:19:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 500. [2022-01-18 16:19:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-01-18 16:19:03,457 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-01-18 16:19:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:03,457 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-01-18 16:19:03,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-01-18 16:19:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:03,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:03,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:03,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:03,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:03,667 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 951990102, now seen corresponding path program 66 times [2022-01-18 16:19:03,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:03,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880827581] [2022-01-18 16:19:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:03,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:03,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880827581] [2022-01-18 16:19:03,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880827581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:03,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682082567] [2022-01-18 16:19:03,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:19:03,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:03,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:03,948 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:03,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 16:19:03,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:19:03,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:03,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:04,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:04,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:04,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:19:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:04,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:05,004 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:05,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:19:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:05,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682082567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:05,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:05,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:19:05,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587102062] [2022-01-18 16:19:05,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:05,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:19:05,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:19:05,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:19:05,058 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:07,102 INFO L93 Difference]: Finished difference Result 957 states and 1927 transitions. [2022-01-18 16:19:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:19:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:07,103 INFO L225 Difference]: With dead ends: 957 [2022-01-18 16:19:07,103 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 16:19:07,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=619, Invalid=5701, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:19:07,104 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:07,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 504 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1392 Invalid, 0 Unknown, 512 Unchecked, 0.5s Time] [2022-01-18 16:19:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 16:19:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 502. [2022-01-18 16:19:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.0518962075848304) internal successors, (1028), 501 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1028 transitions. [2022-01-18 16:19:07,109 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1028 transitions. Word has length 33 [2022-01-18 16:19:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:07,110 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1028 transitions. [2022-01-18 16:19:07,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1028 transitions. [2022-01-18 16:19:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:07,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:07,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:07,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:07,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:07,317 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1727527062, now seen corresponding path program 67 times [2022-01-18 16:19:07,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:07,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093384647] [2022-01-18 16:19:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:07,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:07,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093384647] [2022-01-18 16:19:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093384647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686696318] [2022-01-18 16:19:07,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:19:07,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:07,590 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:07,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 16:19:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:07,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:07,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:07,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:07,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:08,539 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:08,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:08,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686696318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:08,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:08,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:08,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392605608] [2022-01-18 16:19:08,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:08,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:08,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:08,595 INFO L87 Difference]: Start difference. First operand 502 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:11,284 INFO L93 Difference]: Finished difference Result 908 states and 1836 transitions. [2022-01-18 16:19:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:19:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:11,285 INFO L225 Difference]: With dead ends: 908 [2022-01-18 16:19:11,285 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 16:19:11,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=887, Invalid=7855, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:19:11,286 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 240 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:11,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 499 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1829 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-01-18 16:19:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 16:19:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 500. [2022-01-18 16:19:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-01-18 16:19:11,292 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-01-18 16:19:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:11,292 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-01-18 16:19:11,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-01-18 16:19:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:11,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:11,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:11,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 16:19:11,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:11,493 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:11,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1141197868, now seen corresponding path program 68 times [2022-01-18 16:19:11,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:11,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248950099] [2022-01-18 16:19:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:11,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:11,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248950099] [2022-01-18 16:19:11,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248950099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071176314] [2022-01-18 16:19:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:19:11,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:11,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:11,776 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:11,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 16:19:11,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:19:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:12,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:12,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:12,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:12,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:12,705 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:12,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:12,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071176314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:12,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:12,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:12,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446223734] [2022-01-18 16:19:12,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:12,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:12,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:12,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:12,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:12,756 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:15,766 INFO L93 Difference]: Finished difference Result 1088 states and 2173 transitions. [2022-01-18 16:19:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:19:15,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:15,767 INFO L225 Difference]: With dead ends: 1088 [2022-01-18 16:19:15,767 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 16:19:15,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4619 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1466, Invalid=12814, Unknown=0, NotChecked=0, Total=14280 [2022-01-18 16:19:15,768 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 386 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:15,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 579 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2293 Invalid, 0 Unknown, 518 Unchecked, 0.7s Time] [2022-01-18 16:19:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 16:19:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 504. [2022-01-18 16:19:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0536779324055665) internal successors, (1033), 503 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1033 transitions. [2022-01-18 16:19:15,774 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1033 transitions. Word has length 33 [2022-01-18 16:19:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:15,774 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1033 transitions. [2022-01-18 16:19:15,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1033 transitions. [2022-01-18 16:19:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:15,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:15,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:15,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:15,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-01-18 16:19:15,990 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:15,990 INFO L85 PathProgramCache]: Analyzing trace with hash 142203974, now seen corresponding path program 69 times [2022-01-18 16:19:15,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866818911] [2022-01-18 16:19:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:15,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:16,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866818911] [2022-01-18 16:19:16,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866818911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111843051] [2022-01-18 16:19:16,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:19:16,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:16,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:16,199 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:16,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 16:19:16,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:19:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:16,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:16,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:17,199 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:17,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:17,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111843051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:17,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:17,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:17,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397467764] [2022-01-18 16:19:17,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:17,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:17,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:17,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:17,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:17,262 INFO L87 Difference]: Start difference. First operand 504 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:19,283 INFO L93 Difference]: Finished difference Result 932 states and 1863 transitions. [2022-01-18 16:19:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:19:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:19,284 INFO L225 Difference]: With dead ends: 932 [2022-01-18 16:19:19,284 INFO L226 Difference]: Without dead ends: 853 [2022-01-18 16:19:19,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=654, Invalid=6656, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:19:19,285 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 224 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:19,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 470 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1483 Invalid, 0 Unknown, 340 Unchecked, 0.6s Time] [2022-01-18 16:19:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-18 16:19:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 517. [2022-01-18 16:19:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.0426356589147288) internal successors, (1054), 516 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:19,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1054 transitions. [2022-01-18 16:19:19,290 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1054 transitions. Word has length 33 [2022-01-18 16:19:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1054 transitions. [2022-01-18 16:19:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1054 transitions. [2022-01-18 16:19:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:19,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:19,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:19,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:19,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:19,504 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1348678666, now seen corresponding path program 70 times [2022-01-18 16:19:19,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:19,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724888606] [2022-01-18 16:19:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:19,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:19,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724888606] [2022-01-18 16:19:19,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724888606] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979945978] [2022-01-18 16:19:19,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:19:19,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:19,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:19,811 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:19,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 16:19:19,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:19:19,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:20,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:20,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:20,802 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:20,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:20,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979945978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:20,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:20,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:20,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296090196] [2022-01-18 16:19:20,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:20,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:20,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:20,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:20,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:20,859 INFO L87 Difference]: Start difference. First operand 517 states and 1054 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:22,330 INFO L93 Difference]: Finished difference Result 913 states and 1843 transitions. [2022-01-18 16:19:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:19:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:22,331 INFO L225 Difference]: With dead ends: 913 [2022-01-18 16:19:22,331 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 16:19:22,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=552, Invalid=5454, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:19:22,332 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 192 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:22,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 326 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1291 Invalid, 0 Unknown, 11 Unchecked, 0.4s Time] [2022-01-18 16:19:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 16:19:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 508. [2022-01-18 16:19:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.04930966469428) internal successors, (1039), 507 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1039 transitions. [2022-01-18 16:19:22,337 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1039 transitions. Word has length 33 [2022-01-18 16:19:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:22,337 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1039 transitions. [2022-01-18 16:19:22,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1039 transitions. [2022-01-18 16:19:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:22,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:22,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:22,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:22,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:22,548 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:22,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:22,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1950983996, now seen corresponding path program 71 times [2022-01-18 16:19:22,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:22,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975419039] [2022-01-18 16:19:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:22,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:22,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:22,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975419039] [2022-01-18 16:19:22,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975419039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:22,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100167611] [2022-01-18 16:19:22,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:19:22,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:22,795 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:22,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 16:19:22,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:19:22,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:22,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:19:22,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:23,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:23,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:19:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:23,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:23,461 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:23,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:23,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100167611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:23,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:23,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:23,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674102864] [2022-01-18 16:19:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:23,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:23,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:23,512 INFO L87 Difference]: Start difference. First operand 508 states and 1039 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:25,785 INFO L93 Difference]: Finished difference Result 903 states and 1824 transitions. [2022-01-18 16:19:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:19:25,786 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:25,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:25,786 INFO L225 Difference]: With dead ends: 903 [2022-01-18 16:19:25,786 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 16:19:25,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=896, Invalid=7846, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:19:25,787 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:25,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 392 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1848 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-01-18 16:19:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 16:19:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 497. [2022-01-18 16:19:25,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2022-01-18 16:19:25,793 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2022-01-18 16:19:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:25,793 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2022-01-18 16:19:25,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:25,793 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2022-01-18 16:19:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:25,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:25,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:25,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-01-18 16:19:25,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 16:19:25,994 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:25,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash -222286980, now seen corresponding path program 72 times [2022-01-18 16:19:25,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:25,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415137752] [2022-01-18 16:19:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:25,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:26,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415137752] [2022-01-18 16:19:26,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415137752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575051154] [2022-01-18 16:19:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:19:26,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:26,258 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:26,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:19:26,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:19:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 16:19:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:26,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:19:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:26,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:27,201 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:27,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:27,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575051154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:27,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:27,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:27,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52846635] [2022-01-18 16:19:27,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:27,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:27,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:27,246 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:29,119 INFO L93 Difference]: Finished difference Result 831 states and 1671 transitions. [2022-01-18 16:19:29,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:19:29,120 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:29,121 INFO L225 Difference]: With dead ends: 831 [2022-01-18 16:19:29,121 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 16:19:29,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=637, Invalid=5843, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:19:29,121 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:29,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 396 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1654 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-01-18 16:19:29,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 16:19:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-01-18 16:19:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0481927710843375) internal successors, (1020), 498 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1020 transitions. [2022-01-18 16:19:29,127 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1020 transitions. Word has length 33 [2022-01-18 16:19:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:29,127 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1020 transitions. [2022-01-18 16:19:29,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1020 transitions. [2022-01-18 16:19:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:29,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:29,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:29,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-01-18 16:19:29,343 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1203955386, now seen corresponding path program 73 times [2022-01-18 16:19:29,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:29,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979208524] [2022-01-18 16:19:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:29,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:29,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:29,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979208524] [2022-01-18 16:19:29,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979208524] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:29,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572380275] [2022-01-18 16:19:29,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:19:29,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:29,581 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:29,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 16:19:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:29,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:29,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:29,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:30,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:30,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572380275] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:30,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:30,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:30,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868571343] [2022-01-18 16:19:30,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:30,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:30,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:30,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:30,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:30,256 INFO L87 Difference]: Start difference. First operand 499 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:32,475 INFO L93 Difference]: Finished difference Result 823 states and 1654 transitions. [2022-01-18 16:19:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:19:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:32,476 INFO L225 Difference]: With dead ends: 823 [2022-01-18 16:19:32,476 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 16:19:32,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=864, Invalid=7692, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:19:32,477 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 196 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:32,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 437 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2140 Invalid, 0 Unknown, 81 Unchecked, 0.7s Time] [2022-01-18 16:19:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 16:19:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 494. [2022-01-18 16:19:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.04868154158215) internal successors, (1010), 493 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1010 transitions. [2022-01-18 16:19:32,491 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1010 transitions. Word has length 33 [2022-01-18 16:19:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:32,491 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1010 transitions. [2022-01-18 16:19:32,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1010 transitions. [2022-01-18 16:19:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:32,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:32,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:32,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:32,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:32,718 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:32,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2055830614, now seen corresponding path program 74 times [2022-01-18 16:19:32,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:32,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134726629] [2022-01-18 16:19:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:32,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:32,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:32,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134726629] [2022-01-18 16:19:32,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134726629] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:32,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576804331] [2022-01-18 16:19:32,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:19:32,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:32,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:32,991 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:32,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 16:19:33,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:19:33,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:19:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:33,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:33,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:33,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:33,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:33,924 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:33,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:33,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576804331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:33,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:33,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:33,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985584301] [2022-01-18 16:19:33,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:33,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:33,980 INFO L87 Difference]: Start difference. First operand 494 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:36,345 INFO L93 Difference]: Finished difference Result 770 states and 1541 transitions. [2022-01-18 16:19:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:19:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:36,346 INFO L225 Difference]: With dead ends: 770 [2022-01-18 16:19:36,346 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 16:19:36,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=803, Invalid=7387, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:19:36,347 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:36,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 613 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2579 Invalid, 0 Unknown, 162 Unchecked, 0.9s Time] [2022-01-18 16:19:36,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 16:19:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 489. [2022-01-18 16:19:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0512295081967213) internal successors, (1001), 488 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1001 transitions. [2022-01-18 16:19:36,352 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1001 transitions. Word has length 33 [2022-01-18 16:19:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:36,352 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1001 transitions. [2022-01-18 16:19:36,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1001 transitions. [2022-01-18 16:19:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:36,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:36,353 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:36,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:36,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:36,568 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash -246578804, now seen corresponding path program 75 times [2022-01-18 16:19:36,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:36,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380548008] [2022-01-18 16:19:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:36,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:36,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380548008] [2022-01-18 16:19:36,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380548008] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:36,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706861394] [2022-01-18 16:19:36,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:19:36,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:36,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:36,787 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:36,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 16:19:36,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:19:36,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:36,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:37,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:37,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:37,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:37,605 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:37,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:37,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706861394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:37,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:37,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:37,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354359681] [2022-01-18 16:19:37,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:37,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:37,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:37,656 INFO L87 Difference]: Start difference. First operand 489 states and 1001 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:38,882 INFO L93 Difference]: Finished difference Result 876 states and 1750 transitions. [2022-01-18 16:19:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:19:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:38,883 INFO L225 Difference]: With dead ends: 876 [2022-01-18 16:19:38,883 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 16:19:38,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=493, Invalid=5669, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:19:38,891 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 217 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:38,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 635 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1736 Invalid, 0 Unknown, 670 Unchecked, 0.5s Time] [2022-01-18 16:19:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 16:19:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 501. [2022-01-18 16:19:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-01-18 16:19:38,898 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-01-18 16:19:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:38,898 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-01-18 16:19:38,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-01-18 16:19:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:38,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:38,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:38,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:39,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:39,114 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1231585484, now seen corresponding path program 76 times [2022-01-18 16:19:39,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:39,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2967446] [2022-01-18 16:19:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:39,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:39,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2967446] [2022-01-18 16:19:39,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2967446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:39,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466217866] [2022-01-18 16:19:39,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:19:39,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:39,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:39,330 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:39,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 16:19:39,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:19:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:39,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:39,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:39,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:39,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:40,085 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:40,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466217866] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:40,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638097355] [2022-01-18 16:19:40,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:40,129 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:41,233 INFO L93 Difference]: Finished difference Result 885 states and 1753 transitions. [2022-01-18 16:19:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:19:41,233 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:41,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:41,234 INFO L225 Difference]: With dead ends: 885 [2022-01-18 16:19:41,234 INFO L226 Difference]: Without dead ends: 837 [2022-01-18 16:19:41,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=508, Invalid=5812, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:19:41,235 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:41,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 493 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1212 Invalid, 0 Unknown, 396 Unchecked, 0.3s Time] [2022-01-18 16:19:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-01-18 16:19:41,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 501. [2022-01-18 16:19:41,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-01-18 16:19:41,241 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-01-18 16:19:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:41,241 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-01-18 16:19:41,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-01-18 16:19:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:41,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:41,241 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:41,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:41,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:41,456 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:41,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:41,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792910, now seen corresponding path program 77 times [2022-01-18 16:19:41,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231048519] [2022-01-18 16:19:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:41,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:41,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231048519] [2022-01-18 16:19:41,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231048519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:41,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753730004] [2022-01-18 16:19:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:19:41,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:41,746 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:41,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 16:19:41,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:19:41,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:42,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:42,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:42,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:19:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:42,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:42,619 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:42,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:19:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:42,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753730004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:42,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:42,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:19:42,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611017465] [2022-01-18 16:19:42,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:42,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:19:42,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:19:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:19:42,671 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:44,686 INFO L93 Difference]: Finished difference Result 868 states and 1755 transitions. [2022-01-18 16:19:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:19:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:44,687 INFO L225 Difference]: With dead ends: 868 [2022-01-18 16:19:44,687 INFO L226 Difference]: Without dead ends: 820 [2022-01-18 16:19:44,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=569, Invalid=6913, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 16:19:44,688 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:44,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 613 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2057 Invalid, 0 Unknown, 556 Unchecked, 0.8s Time] [2022-01-18 16:19:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-01-18 16:19:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 504. [2022-01-18 16:19:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.05765407554672) internal successors, (1035), 503 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1035 transitions. [2022-01-18 16:19:44,693 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1035 transitions. Word has length 33 [2022-01-18 16:19:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1035 transitions. [2022-01-18 16:19:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1035 transitions. [2022-01-18 16:19:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:44,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:44,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:44,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:44,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:44,902 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1876551796, now seen corresponding path program 78 times [2022-01-18 16:19:44,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939407431] [2022-01-18 16:19:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:44,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:45,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939407431] [2022-01-18 16:19:45,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939407431] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244622009] [2022-01-18 16:19:45,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:19:45,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:45,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:45,143 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:45,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 16:19:45,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:19:45,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:45,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:45,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:45,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:45,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:45,845 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:45,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244622009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:45,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:45,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:45,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450473098] [2022-01-18 16:19:45,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:45,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:45,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:45,882 INFO L87 Difference]: Start difference. First operand 504 states and 1035 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:47,643 INFO L93 Difference]: Finished difference Result 932 states and 1853 transitions. [2022-01-18 16:19:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:19:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:47,645 INFO L225 Difference]: With dead ends: 932 [2022-01-18 16:19:47,645 INFO L226 Difference]: Without dead ends: 896 [2022-01-18 16:19:47,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=639, Invalid=7733, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:19:47,645 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:47,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 680 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1285 Invalid, 0 Unknown, 429 Unchecked, 0.4s Time] [2022-01-18 16:19:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-18 16:19:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 563. [2022-01-18 16:19:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.0249110320284696) internal successors, (1138), 562 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1138 transitions. [2022-01-18 16:19:47,659 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1138 transitions. Word has length 33 [2022-01-18 16:19:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:47,660 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1138 transitions. [2022-01-18 16:19:47,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1138 transitions. [2022-01-18 16:19:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:47,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:47,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:47,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-01-18 16:19:47,879 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2145694682, now seen corresponding path program 79 times [2022-01-18 16:19:47,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:47,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464601302] [2022-01-18 16:19:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:47,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:48,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:48,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464601302] [2022-01-18 16:19:48,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464601302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:48,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736705586] [2022-01-18 16:19:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:19:48,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:48,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:48,159 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:48,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 16:19:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:48,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:48,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:48,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:49,161 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:49,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:49,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736705586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:49,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:49,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:49,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486369695] [2022-01-18 16:19:49,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:49,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:49,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:49,223 INFO L87 Difference]: Start difference. First operand 563 states and 1138 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:52,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:52,220 INFO L93 Difference]: Finished difference Result 1276 states and 2525 transitions. [2022-01-18 16:19:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 16:19:52,220 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:52,221 INFO L225 Difference]: With dead ends: 1276 [2022-01-18 16:19:52,221 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 16:19:52,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1133, Invalid=12207, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 16:19:52,222 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 294 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:52,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 778 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2261 Invalid, 0 Unknown, 730 Unchecked, 0.8s Time] [2022-01-18 16:19:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 16:19:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 509. [2022-01-18 16:19:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.059055118110236) internal successors, (1046), 508 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1046 transitions. [2022-01-18 16:19:52,229 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1046 transitions. Word has length 33 [2022-01-18 16:19:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:52,229 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1046 transitions. [2022-01-18 16:19:52,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1046 transitions. [2022-01-18 16:19:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:52,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:52,230 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:52,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:52,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:52,444 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:52,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1777304910, now seen corresponding path program 80 times [2022-01-18 16:19:52,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:52,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113597215] [2022-01-18 16:19:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:52,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:52,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113597215] [2022-01-18 16:19:52,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113597215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650058369] [2022-01-18 16:19:52,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:19:52,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:52,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:52,641 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:52,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 16:19:52,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:19:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:52,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:52,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:52,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:52,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:53,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:53,536 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:53,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:53,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650058369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:53,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:53,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:53,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258405226] [2022-01-18 16:19:53,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:53,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:53,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:53,591 INFO L87 Difference]: Start difference. First operand 509 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:19:55,828 INFO L93 Difference]: Finished difference Result 1020 states and 2080 transitions. [2022-01-18 16:19:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:19:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:19:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:19:55,829 INFO L225 Difference]: With dead ends: 1020 [2022-01-18 16:19:55,829 INFO L226 Difference]: Without dead ends: 988 [2022-01-18 16:19:55,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=830, Invalid=7542, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:19:55,830 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:19:55,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 489 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1445 Invalid, 0 Unknown, 344 Unchecked, 0.5s Time] [2022-01-18 16:19:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-01-18 16:19:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 514. [2022-01-18 16:19:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.060428849902534) internal successors, (1057), 513 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1057 transitions. [2022-01-18 16:19:55,835 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1057 transitions. Word has length 33 [2022-01-18 16:19:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:19:55,836 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1057 transitions. [2022-01-18 16:19:55,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:19:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1057 transitions. [2022-01-18 16:19:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:19:55,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:19:55,836 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:19:55,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-18 16:19:56,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:56,051 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:19:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:19:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1091420020, now seen corresponding path program 81 times [2022-01-18 16:19:56,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:19:56,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927560082] [2022-01-18 16:19:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:19:56,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:19:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:19:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:56,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:19:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927560082] [2022-01-18 16:19:56,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927560082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:19:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559657716] [2022-01-18 16:19:56,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:19:56,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:19:56,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:19:56,323 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:19:56,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 16:19:56,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:19:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:19:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:19:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:19:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:19:56,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:19:56,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:19:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:56,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:19:57,290 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:19:57,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:19:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:19:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559657716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:19:57,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:19:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:19:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542952128] [2022-01-18 16:19:57,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:19:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:19:57,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:19:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:19:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:19:57,347 INFO L87 Difference]: Start difference. First operand 514 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:00,214 INFO L93 Difference]: Finished difference Result 945 states and 1913 transitions. [2022-01-18 16:20:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:20:00,214 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:00,215 INFO L225 Difference]: With dead ends: 945 [2022-01-18 16:20:00,215 INFO L226 Difference]: Without dead ends: 917 [2022-01-18 16:20:00,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1047, Invalid=8853, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:20:00,216 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 285 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:00,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 390 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1445 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-01-18 16:20:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-01-18 16:20:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 506. [2022-01-18 16:20:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0554455445544555) internal successors, (1038), 505 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1038 transitions. [2022-01-18 16:20:00,222 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1038 transitions. Word has length 33 [2022-01-18 16:20:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:00,222 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1038 transitions. [2022-01-18 16:20:00,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1038 transitions. [2022-01-18 16:20:00,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:00,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:00,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:00,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:00,426 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1883626412, now seen corresponding path program 82 times [2022-01-18 16:20:00,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:00,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319760568] [2022-01-18 16:20:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:00,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:00,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319760568] [2022-01-18 16:20:00,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319760568] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:00,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249291075] [2022-01-18 16:20:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:00,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:00,690 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:00,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 16:20:00,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:00,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:00,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:01,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:01,493 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:01,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:01,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249291075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:01,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:01,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:01,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772683977] [2022-01-18 16:20:01,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:01,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:01,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:01,545 INFO L87 Difference]: Start difference. First operand 506 states and 1038 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:03,456 INFO L93 Difference]: Finished difference Result 914 states and 1839 transitions. [2022-01-18 16:20:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:20:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:03,457 INFO L225 Difference]: With dead ends: 914 [2022-01-18 16:20:03,457 INFO L226 Difference]: Without dead ends: 883 [2022-01-18 16:20:03,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=608, Invalid=6702, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:20:03,457 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 210 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:03,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 740 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1838 Invalid, 0 Unknown, 873 Unchecked, 0.7s Time] [2022-01-18 16:20:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-18 16:20:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 530. [2022-01-18 16:20:03,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.0396975425330814) internal successors, (1079), 529 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1079 transitions. [2022-01-18 16:20:03,463 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1079 transitions. Word has length 33 [2022-01-18 16:20:03,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:03,463 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1079 transitions. [2022-01-18 16:20:03,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1079 transitions. [2022-01-18 16:20:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:03,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:03,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:03,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:03,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:03,679 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash 838097554, now seen corresponding path program 83 times [2022-01-18 16:20:03,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486987025] [2022-01-18 16:20:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:03,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:03,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486987025] [2022-01-18 16:20:03,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486987025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:03,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14033414] [2022-01-18 16:20:03,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:03,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:03,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:03,970 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:03,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 16:20:04,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:20:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:04,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:20:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:04,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:04,811 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:04,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:20:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:04,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14033414] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:04,848 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:04,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:20:04,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031136175] [2022-01-18 16:20:04,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:04,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:20:04,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:20:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:20:04,849 INFO L87 Difference]: Start difference. First operand 530 states and 1079 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:06,568 INFO L93 Difference]: Finished difference Result 884 states and 1786 transitions. [2022-01-18 16:20:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:20:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:06,569 INFO L225 Difference]: With dead ends: 884 [2022-01-18 16:20:06,569 INFO L226 Difference]: Without dead ends: 855 [2022-01-18 16:20:06,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=625, Invalid=7031, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:20:06,570 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:06,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 482 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1701 Invalid, 0 Unknown, 402 Unchecked, 0.5s Time] [2022-01-18 16:20:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-18 16:20:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 525. [2022-01-18 16:20:06,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.0400763358778624) internal successors, (1069), 524 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1069 transitions. [2022-01-18 16:20:06,576 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1069 transitions. Word has length 33 [2022-01-18 16:20:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:06,576 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1069 transitions. [2022-01-18 16:20:06,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1069 transitions. [2022-01-18 16:20:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:06,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:06,576 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:06,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:06,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:06,792 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:06,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1321500814, now seen corresponding path program 84 times [2022-01-18 16:20:06,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:06,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616881577] [2022-01-18 16:20:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:06,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:07,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616881577] [2022-01-18 16:20:07,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616881577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087796773] [2022-01-18 16:20:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:20:07,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:07,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:07,027 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:07,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 16:20:07,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:20:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:07,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:20:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:07,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:07,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:07,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:20:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:07,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:07,803 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:07,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:07,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087796773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:07,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:07,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:07,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205512379] [2022-01-18 16:20:07,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:07,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:07,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:07,840 INFO L87 Difference]: Start difference. First operand 525 states and 1069 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:09,328 INFO L93 Difference]: Finished difference Result 888 states and 1792 transitions. [2022-01-18 16:20:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:20:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:09,330 INFO L225 Difference]: With dead ends: 888 [2022-01-18 16:20:09,330 INFO L226 Difference]: Without dead ends: 859 [2022-01-18 16:20:09,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=589, Invalid=6383, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 16:20:09,330 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:09,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 450 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1451 Invalid, 0 Unknown, 639 Unchecked, 0.5s Time] [2022-01-18 16:20:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-01-18 16:20:09,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 503. [2022-01-18 16:20:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.051792828685259) internal successors, (1030), 502 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:09,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1030 transitions. [2022-01-18 16:20:09,336 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1030 transitions. Word has length 33 [2022-01-18 16:20:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:09,336 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1030 transitions. [2022-01-18 16:20:09,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1030 transitions. [2022-01-18 16:20:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:09,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:09,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:09,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:09,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 16:20:09,551 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:09,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1309709944, now seen corresponding path program 85 times [2022-01-18 16:20:09,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:09,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273348822] [2022-01-18 16:20:09,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:09,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:09,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273348822] [2022-01-18 16:20:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273348822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772878789] [2022-01-18 16:20:09,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:20:09,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:09,828 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:09,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 16:20:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:10,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:10,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:10,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:10,835 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:10,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:10,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772878789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:10,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:10,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:10,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290329942] [2022-01-18 16:20:10,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:10,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:10,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:10,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:10,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:10,898 INFO L87 Difference]: Start difference. First operand 503 states and 1030 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:12,302 INFO L93 Difference]: Finished difference Result 895 states and 1804 transitions. [2022-01-18 16:20:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:20:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:12,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:12,303 INFO L225 Difference]: With dead ends: 895 [2022-01-18 16:20:12,303 INFO L226 Difference]: Without dead ends: 838 [2022-01-18 16:20:12,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=515, Invalid=5647, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:20:12,304 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:12,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 492 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1159 Invalid, 0 Unknown, 659 Unchecked, 0.4s Time] [2022-01-18 16:20:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-01-18 16:20:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 503. [2022-01-18 16:20:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.049800796812749) internal successors, (1029), 502 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:12,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1029 transitions. [2022-01-18 16:20:12,309 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1029 transitions. Word has length 33 [2022-01-18 16:20:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1029 transitions. [2022-01-18 16:20:12,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1029 transitions. [2022-01-18 16:20:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:12,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:12,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:12,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:12,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:12,523 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 2054221944, now seen corresponding path program 86 times [2022-01-18 16:20:12,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:12,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842799082] [2022-01-18 16:20:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:12,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:12,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842799082] [2022-01-18 16:20:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842799082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:12,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425207909] [2022-01-18 16:20:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:12,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:12,723 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:12,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:12,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 16:20:12,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:12,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:12,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:13,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:13,382 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:13,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425207909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:13,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:13,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644766373] [2022-01-18 16:20:13,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:13,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:13,472 INFO L87 Difference]: Start difference. First operand 503 states and 1029 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:15,193 INFO L93 Difference]: Finished difference Result 936 states and 1879 transitions. [2022-01-18 16:20:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:20:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:15,194 INFO L225 Difference]: With dead ends: 936 [2022-01-18 16:20:15,194 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 16:20:15,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=786, Invalid=7224, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:20:15,195 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:15,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 458 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1520 Invalid, 0 Unknown, 388 Unchecked, 0.5s Time] [2022-01-18 16:20:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 16:20:15,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 504. [2022-01-18 16:20:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0497017892644136) internal successors, (1031), 503 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1031 transitions. [2022-01-18 16:20:15,201 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1031 transitions. Word has length 33 [2022-01-18 16:20:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:15,201 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1031 transitions. [2022-01-18 16:20:15,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1031 transitions. [2022-01-18 16:20:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:15,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:15,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:15,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 16:20:15,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:15,403 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -814502986, now seen corresponding path program 87 times [2022-01-18 16:20:15,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:15,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942654249] [2022-01-18 16:20:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:15,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:15,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942654249] [2022-01-18 16:20:15,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942654249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:15,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817631563] [2022-01-18 16:20:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:20:15,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:15,675 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:15,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 16:20:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:20:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:15,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:15,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:16,415 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:16,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:16,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817631563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:16,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:16,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:16,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167724943] [2022-01-18 16:20:16,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:16,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:16,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:16,452 INFO L87 Difference]: Start difference. First operand 504 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:19,173 INFO L93 Difference]: Finished difference Result 1183 states and 2371 transitions. [2022-01-18 16:20:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:20:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:19,175 INFO L225 Difference]: With dead ends: 1183 [2022-01-18 16:20:19,175 INFO L226 Difference]: Without dead ends: 1155 [2022-01-18 16:20:19,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1076, Invalid=9024, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:20:19,176 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:19,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 461 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1508 Invalid, 0 Unknown, 351 Unchecked, 0.6s Time] [2022-01-18 16:20:19,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-18 16:20:19,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 499. [2022-01-18 16:20:19,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0502008032128516) internal successors, (1021), 498 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1021 transitions. [2022-01-18 16:20:19,182 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1021 transitions. Word has length 33 [2022-01-18 16:20:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:19,182 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1021 transitions. [2022-01-18 16:20:19,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1021 transitions. [2022-01-18 16:20:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:19,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:19,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:19,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:19,397 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1885546406, now seen corresponding path program 88 times [2022-01-18 16:20:19,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21549486] [2022-01-18 16:20:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:19,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:19,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:19,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21549486] [2022-01-18 16:20:19,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21549486] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:19,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957378582] [2022-01-18 16:20:19,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:19,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:19,601 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:19,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 16:20:19,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:19,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:19,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:19,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:19,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:19,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:20,314 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:20,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:20,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957378582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:20,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:20,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:20,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394146475] [2022-01-18 16:20:20,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:20,379 INFO L87 Difference]: Start difference. First operand 499 states and 1021 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:21,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:21,665 INFO L93 Difference]: Finished difference Result 925 states and 1853 transitions. [2022-01-18 16:20:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:20:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:21,666 INFO L225 Difference]: With dead ends: 925 [2022-01-18 16:20:21,666 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 16:20:21,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=558, Invalid=6248, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:20:21,666 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:21,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 440 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1383 Invalid, 0 Unknown, 403 Unchecked, 0.4s Time] [2022-01-18 16:20:21,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 16:20:21,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 505. [2022-01-18 16:20:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-01-18 16:20:21,672 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-01-18 16:20:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-01-18 16:20:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-01-18 16:20:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:21,672 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:21,672 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:21,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:21,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:21,887 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1244435816, now seen corresponding path program 89 times [2022-01-18 16:20:21,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908531656] [2022-01-18 16:20:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:21,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:22,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908531656] [2022-01-18 16:20:22,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908531656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:22,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935705915] [2022-01-18 16:20:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:22,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:22,086 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 16:20:22,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:20:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:22,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:20:22,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:22,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:22,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:22,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:22,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:22,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:22,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:20:22,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2022-01-18 16:20:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:22,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935705915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:22,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:22,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-01-18 16:20:22,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692212627] [2022-01-18 16:20:22,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:22,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:20:22,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:20:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:20:22,896 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:28,553 INFO L93 Difference]: Finished difference Result 1648 states and 3268 transitions. [2022-01-18 16:20:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-18 16:20:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:28,555 INFO L225 Difference]: With dead ends: 1648 [2022-01-18 16:20:28,555 INFO L226 Difference]: Without dead ends: 1484 [2022-01-18 16:20:28,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9447 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3160, Invalid=25910, Unknown=0, NotChecked=0, Total=29070 [2022-01-18 16:20:28,557 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 489 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:28,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 797 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3107 Invalid, 0 Unknown, 611 Unchecked, 1.2s Time] [2022-01-18 16:20:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-01-18 16:20:28,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 539. [2022-01-18 16:20:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-01-18 16:20:28,565 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-01-18 16:20:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:28,565 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-01-18 16:20:28,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-01-18 16:20:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:28,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:28,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:28,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:28,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:28,782 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1624289114, now seen corresponding path program 90 times [2022-01-18 16:20:28,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:28,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061259941] [2022-01-18 16:20:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:28,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:29,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:29,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061259941] [2022-01-18 16:20:29,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061259941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:29,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102253442] [2022-01-18 16:20:29,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:20:29,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:29,043 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:29,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 16:20:29,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:20:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:20:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:29,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:29,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:20:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:29,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:30,022 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:30,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102253442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:30,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:30,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:30,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558441050] [2022-01-18 16:20:30,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:30,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:30,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:30,080 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:32,301 INFO L93 Difference]: Finished difference Result 1125 states and 2260 transitions. [2022-01-18 16:20:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:20:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:32,302 INFO L225 Difference]: With dead ends: 1125 [2022-01-18 16:20:32,302 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 16:20:32,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1045, Invalid=9461, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:20:32,303 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:32,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 481 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1800 Invalid, 0 Unknown, 170 Unchecked, 0.6s Time] [2022-01-18 16:20:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 16:20:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 539. [2022-01-18 16:20:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-01-18 16:20:32,309 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-01-18 16:20:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:32,310 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-01-18 16:20:32,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-01-18 16:20:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:32,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:32,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:32,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-01-18 16:20:32,520 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1677127142, now seen corresponding path program 91 times [2022-01-18 16:20:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:32,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616892666] [2022-01-18 16:20:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:32,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:32,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616892666] [2022-01-18 16:20:32,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616892666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619821774] [2022-01-18 16:20:32,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:20:32,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:32,732 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:32,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 16:20:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:33,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:33,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:33,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:33,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:33,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619821774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:33,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:33,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:33,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469124984] [2022-01-18 16:20:33,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:33,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:33,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:33,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:33,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:33,534 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:35,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:35,011 INFO L93 Difference]: Finished difference Result 1087 states and 2194 transitions. [2022-01-18 16:20:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:20:35,012 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:35,013 INFO L225 Difference]: With dead ends: 1087 [2022-01-18 16:20:35,013 INFO L226 Difference]: Without dead ends: 1055 [2022-01-18 16:20:35,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=678, Invalid=6632, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:20:35,014 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:35,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 494 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1846 Invalid, 0 Unknown, 197 Unchecked, 0.5s Time] [2022-01-18 16:20:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-01-18 16:20:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 535. [2022-01-18 16:20:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.048689138576779) internal successors, (1094), 534 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1094 transitions. [2022-01-18 16:20:35,020 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1094 transitions. Word has length 33 [2022-01-18 16:20:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:35,020 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1094 transitions. [2022-01-18 16:20:35,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1094 transitions. [2022-01-18 16:20:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:35,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:35,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:35,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:35,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 16:20:35,233 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash -250884776, now seen corresponding path program 92 times [2022-01-18 16:20:35,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:35,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985882430] [2022-01-18 16:20:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:35,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:35,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985882430] [2022-01-18 16:20:35,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985882430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:35,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796906174] [2022-01-18 16:20:35,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:35,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:35,523 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:35,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 16:20:35,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:35,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:35,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:35,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:35,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:36,278 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:36,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:36,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796906174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:36,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:36,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:36,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665617484] [2022-01-18 16:20:36,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:36,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:36,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:36,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:36,337 INFO L87 Difference]: Start difference. First operand 535 states and 1094 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:38,914 INFO L93 Difference]: Finished difference Result 1177 states and 2374 transitions. [2022-01-18 16:20:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-18 16:20:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:38,916 INFO L225 Difference]: With dead ends: 1177 [2022-01-18 16:20:38,916 INFO L226 Difference]: Without dead ends: 1149 [2022-01-18 16:20:38,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1108, Invalid=10234, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 16:20:38,916 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:38,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 510 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1845 Invalid, 0 Unknown, 318 Unchecked, 0.7s Time] [2022-01-18 16:20:38,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-18 16:20:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 537. [2022-01-18 16:20:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.048507462686567) internal successors, (1098), 536 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1098 transitions. [2022-01-18 16:20:38,922 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1098 transitions. Word has length 33 [2022-01-18 16:20:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:38,922 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1098 transitions. [2022-01-18 16:20:38,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1098 transitions. [2022-01-18 16:20:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:38,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:38,923 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:38,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:39,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:39,129 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash 104407902, now seen corresponding path program 93 times [2022-01-18 16:20:39,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:39,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765333719] [2022-01-18 16:20:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:39,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:39,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765333719] [2022-01-18 16:20:39,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765333719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:39,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472284317] [2022-01-18 16:20:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:20:39,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:39,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:39,408 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:39,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 16:20:39,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:20:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:39,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:39,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:39,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:40,162 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:40,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:40,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472284317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:40,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:40,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:40,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605073087] [2022-01-18 16:20:40,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:40,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:40,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:40,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:40,228 INFO L87 Difference]: Start difference. First operand 537 states and 1098 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:41,867 INFO L93 Difference]: Finished difference Result 1024 states and 2066 transitions. [2022-01-18 16:20:41,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:20:41,867 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:41,868 INFO L225 Difference]: With dead ends: 1024 [2022-01-18 16:20:41,868 INFO L226 Difference]: Without dead ends: 992 [2022-01-18 16:20:41,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:20:41,868 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:41,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 450 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1737 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-01-18 16:20:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-18 16:20:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 538. [2022-01-18 16:20:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-01-18 16:20:41,874 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-01-18 16:20:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:41,874 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-01-18 16:20:41,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:41,874 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-01-18 16:20:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:41,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:41,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:41,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 16:20:42,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:42,078 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:42,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:42,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1530650268, now seen corresponding path program 94 times [2022-01-18 16:20:42,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:42,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618716683] [2022-01-18 16:20:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:42,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:42,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618716683] [2022-01-18 16:20:42,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618716683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:42,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038240730] [2022-01-18 16:20:42,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:20:42,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:42,344 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:42,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 16:20:42,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:20:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:42,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:42,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:42,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:43,293 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:43,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:43,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038240730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:43,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:43,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989102426] [2022-01-18 16:20:43,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:43,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:43,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:43,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:43,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:43,346 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:45,532 INFO L93 Difference]: Finished difference Result 1023 states and 2068 transitions. [2022-01-18 16:20:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 16:20:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:45,533 INFO L225 Difference]: With dead ends: 1023 [2022-01-18 16:20:45,533 INFO L226 Difference]: Without dead ends: 995 [2022-01-18 16:20:45,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=792, Invalid=7398, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:20:45,534 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 208 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:45,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 494 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2093 Invalid, 0 Unknown, 139 Unchecked, 0.8s Time] [2022-01-18 16:20:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-01-18 16:20:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 538. [2022-01-18 16:20:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-01-18 16:20:45,540 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-01-18 16:20:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:45,540 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-01-18 16:20:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-01-18 16:20:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:45,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:45,541 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:45,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 16:20:45,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 16:20:45,741 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1729135732, now seen corresponding path program 95 times [2022-01-18 16:20:45,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438820073] [2022-01-18 16:20:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:45,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:46,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438820073] [2022-01-18 16:20:46,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438820073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668071735] [2022-01-18 16:20:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:20:46,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:46,013 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:46,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 16:20:46,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:20:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:46,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:20:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:46,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:46,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:46,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:46,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:47,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:47,246 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:20:47,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:20:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:47,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668071735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:47,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:47,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:20:47,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519038005] [2022-01-18 16:20:47,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:47,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:20:47,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:20:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:20:47,353 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:51,637 INFO L93 Difference]: Finished difference Result 1283 states and 2509 transitions. [2022-01-18 16:20:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-18 16:20:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:51,638 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 16:20:51,638 INFO L226 Difference]: Without dead ends: 1171 [2022-01-18 16:20:51,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5613 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1985, Invalid=17197, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 16:20:51,640 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 359 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 3629 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:51,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 987 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3629 Invalid, 0 Unknown, 475 Unchecked, 1.3s Time] [2022-01-18 16:20:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-01-18 16:20:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 542. [2022-01-18 16:20:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.048059149722736) internal successors, (1108), 541 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1108 transitions. [2022-01-18 16:20:51,648 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1108 transitions. Word has length 33 [2022-01-18 16:20:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1108 transitions. [2022-01-18 16:20:51,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1108 transitions. [2022-01-18 16:20:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:51,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:51,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:51,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-18 16:20:51,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:51,864 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 747488074, now seen corresponding path program 96 times [2022-01-18 16:20:51,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:51,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629831786] [2022-01-18 16:20:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:51,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:52,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629831786] [2022-01-18 16:20:52,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629831786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:52,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729816986] [2022-01-18 16:20:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:20:52,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:52,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:52,149 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:52,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 16:20:52,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:20:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:20:52,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:52,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:52,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:20:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:52,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:53,119 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:53,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:53,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729816986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:53,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:53,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:53,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504148901] [2022-01-18 16:20:53,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:53,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:53,174 INFO L87 Difference]: Start difference. First operand 542 states and 1108 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:54,821 INFO L93 Difference]: Finished difference Result 810 states and 1637 transitions. [2022-01-18 16:20:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:20:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:54,822 INFO L225 Difference]: With dead ends: 810 [2022-01-18 16:20:54,822 INFO L226 Difference]: Without dead ends: 774 [2022-01-18 16:20:54,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=547, Invalid=5773, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:20:54,823 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:54,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 450 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1441 Invalid, 0 Unknown, 154 Unchecked, 0.5s Time] [2022-01-18 16:20:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-01-18 16:20:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 552. [2022-01-18 16:20:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.043557168784029) internal successors, (1126), 551 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1126 transitions. [2022-01-18 16:20:54,828 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1126 transitions. Word has length 33 [2022-01-18 16:20:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:54,828 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1126 transitions. [2022-01-18 16:20:54,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:54,828 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1126 transitions. [2022-01-18 16:20:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:54,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:54,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:54,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-18 16:20:55,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:55,044 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:55,044 INFO L85 PathProgramCache]: Analyzing trace with hash -28897898, now seen corresponding path program 97 times [2022-01-18 16:20:55,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:55,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146368846] [2022-01-18 16:20:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:55,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:55,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146368846] [2022-01-18 16:20:55,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146368846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236214596] [2022-01-18 16:20:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:20:55,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:55,344 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:55,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 16:20:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:55,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:55,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:55,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:55,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:56,328 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:56,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:56,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236214596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:56,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:56,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:56,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415465753] [2022-01-18 16:20:56,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:56,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:56,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:56,394 INFO L87 Difference]: Start difference. First operand 552 states and 1126 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:20:57,381 INFO L93 Difference]: Finished difference Result 685 states and 1377 transitions. [2022-01-18 16:20:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:20:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:20:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:20:57,382 INFO L225 Difference]: With dead ends: 685 [2022-01-18 16:20:57,382 INFO L226 Difference]: Without dead ends: 636 [2022-01-18 16:20:57,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=3411, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 16:20:57,382 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:20:57,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 492 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1057 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2022-01-18 16:20:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-18 16:20:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 543. [2022-01-18 16:20:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.047970479704797) internal successors, (1110), 542 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1110 transitions. [2022-01-18 16:20:57,387 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1110 transitions. Word has length 33 [2022-01-18 16:20:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:20:57,387 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1110 transitions. [2022-01-18 16:20:57,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:20:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1110 transitions. [2022-01-18 16:20:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:20:57,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:20:57,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:20:57,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 16:20:57,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 16:20:57,599 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:20:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:20:57,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2133110664, now seen corresponding path program 98 times [2022-01-18 16:20:57,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:20:57,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880062153] [2022-01-18 16:20:57,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:20:57,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:20:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:20:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:57,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:20:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880062153] [2022-01-18 16:20:57,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880062153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:20:57,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849135928] [2022-01-18 16:20:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:20:57,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:20:57,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:20:57,879 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:20:57,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 16:20:57,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:20:57,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:20:57,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:20:57,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:20:58,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:20:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:20:58,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:20:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:20:58,854 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:20:58,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:20:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:20:58,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849135928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:20:58,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:20:58,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:20:58,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894069280] [2022-01-18 16:20:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:20:58,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:20:58,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:20:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:20:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:20:58,918 INFO L87 Difference]: Start difference. First operand 543 states and 1110 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:01,734 INFO L93 Difference]: Finished difference Result 1127 states and 2255 transitions. [2022-01-18 16:21:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-18 16:21:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:01,736 INFO L225 Difference]: With dead ends: 1127 [2022-01-18 16:21:01,736 INFO L226 Difference]: Without dead ends: 1031 [2022-01-18 16:21:01,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=930, Invalid=9782, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 16:21:01,737 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:01,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 601 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2361 Invalid, 0 Unknown, 121 Unchecked, 0.9s Time] [2022-01-18 16:21:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-01-18 16:21:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 551. [2022-01-18 16:21:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.0490909090909093) internal successors, (1127), 550 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1127 transitions. [2022-01-18 16:21:01,743 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1127 transitions. Word has length 33 [2022-01-18 16:21:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:01,743 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1127 transitions. [2022-01-18 16:21:01,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1127 transitions. [2022-01-18 16:21:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:01,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:01,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:01,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 16:21:01,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 16:21:01,958 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1492000074, now seen corresponding path program 99 times [2022-01-18 16:21:01,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665519337] [2022-01-18 16:21:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:01,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:02,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665519337] [2022-01-18 16:21:02,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665519337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:02,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861222065] [2022-01-18 16:21:02,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:02,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:02,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:02,232 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:02,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 16:21:02,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:21:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:02,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:02,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:02,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:02,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:03,193 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:03,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:03,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861222065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:03,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:03,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:03,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069903710] [2022-01-18 16:21:03,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:03,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:03,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:03,242 INFO L87 Difference]: Start difference. First operand 551 states and 1127 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:05,554 INFO L93 Difference]: Finished difference Result 911 states and 1830 transitions. [2022-01-18 16:21:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:21:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:05,555 INFO L225 Difference]: With dead ends: 911 [2022-01-18 16:21:05,555 INFO L226 Difference]: Without dead ends: 879 [2022-01-18 16:21:05,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=755, Invalid=6901, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:21:05,556 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:05,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 605 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1951 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-01-18 16:21:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-01-18 16:21:05,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 554. [2022-01-18 16:21:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0488245931283906) internal successors, (1133), 553 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:05,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1133 transitions. [2022-01-18 16:21:05,561 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1133 transitions. Word has length 33 [2022-01-18 16:21:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:05,561 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1133 transitions. [2022-01-18 16:21:05,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1133 transitions. [2022-01-18 16:21:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:05,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:05,562 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:05,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:05,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:05,763 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1376724856, now seen corresponding path program 100 times [2022-01-18 16:21:05,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875384714] [2022-01-18 16:21:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:05,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:05,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875384714] [2022-01-18 16:21:05,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875384714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363435070] [2022-01-18 16:21:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:05,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:05,968 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:05,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 16:21:05,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:05,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:05,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:05,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:06,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:06,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:06,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:06,749 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:06,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:06,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363435070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:06,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:06,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:06,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808530807] [2022-01-18 16:21:06,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:06,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:06,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:06,792 INFO L87 Difference]: Start difference. First operand 554 states and 1133 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:09,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:09,457 INFO L93 Difference]: Finished difference Result 1082 states and 2167 transitions. [2022-01-18 16:21:09,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-18 16:21:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:09,459 INFO L225 Difference]: With dead ends: 1082 [2022-01-18 16:21:09,459 INFO L226 Difference]: Without dead ends: 1026 [2022-01-18 16:21:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3756 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1258, Invalid=10514, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:21:09,460 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:09,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 416 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1626 Invalid, 0 Unknown, 554 Unchecked, 0.6s Time] [2022-01-18 16:21:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-01-18 16:21:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 549. [2022-01-18 16:21:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0492700729927007) internal successors, (1123), 548 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1123 transitions. [2022-01-18 16:21:09,466 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1123 transitions. Word has length 33 [2022-01-18 16:21:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:09,466 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1123 transitions. [2022-01-18 16:21:09,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1123 transitions. [2022-01-18 16:21:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:09,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:09,466 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:09,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:09,681 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -93323014, now seen corresponding path program 101 times [2022-01-18 16:21:09,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:09,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528317064] [2022-01-18 16:21:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:09,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:09,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528317064] [2022-01-18 16:21:09,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528317064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:09,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171487122] [2022-01-18 16:21:09,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:09,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:09,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:09,887 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:09,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 16:21:09,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:21:09,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:09,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:10,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:10,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:10,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:21:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:10,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:11,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:11,098 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:21:11,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 55 [2022-01-18 16:21:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:11,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171487122] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:11,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:11,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:21:11,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109364861] [2022-01-18 16:21:11,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:11,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:21:11,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:21:11,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:21:11,183 INFO L87 Difference]: Start difference. First operand 549 states and 1123 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:13,745 INFO L93 Difference]: Finished difference Result 971 states and 1955 transitions. [2022-01-18 16:21:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:21:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:13,747 INFO L225 Difference]: With dead ends: 971 [2022-01-18 16:21:13,747 INFO L226 Difference]: Without dead ends: 931 [2022-01-18 16:21:13,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1012, Invalid=9088, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:21:13,747 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 248 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:13,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 414 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1659 Invalid, 0 Unknown, 340 Unchecked, 0.7s Time] [2022-01-18 16:21:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-01-18 16:21:13,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 549. [2022-01-18 16:21:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0474452554744524) internal successors, (1122), 548 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1122 transitions. [2022-01-18 16:21:13,753 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1122 transitions. Word has length 33 [2022-01-18 16:21:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:13,753 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1122 transitions. [2022-01-18 16:21:13,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1122 transitions. [2022-01-18 16:21:13,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:13,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:13,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:13,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:13,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 16:21:13,963 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:13,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:13,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1860860232, now seen corresponding path program 102 times [2022-01-18 16:21:13,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751720744] [2022-01-18 16:21:13,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:13,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:14,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751720744] [2022-01-18 16:21:14,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751720744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096488696] [2022-01-18 16:21:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:14,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:14,239 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 16:21:14,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:21:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:14,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:21:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:14,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:14,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:14,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:14,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:15,258 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:15,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:15,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096488696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:15,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:15,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:15,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551638028] [2022-01-18 16:21:15,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:15,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:15,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:15,321 INFO L87 Difference]: Start difference. First operand 549 states and 1122 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:17,033 INFO L93 Difference]: Finished difference Result 904 states and 1824 transitions. [2022-01-18 16:21:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:21:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:17,034 INFO L225 Difference]: With dead ends: 904 [2022-01-18 16:21:17,034 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 16:21:17,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=574, Invalid=5906, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:21:17,034 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:17,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 443 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1542 Invalid, 0 Unknown, 347 Unchecked, 0.6s Time] [2022-01-18 16:21:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 16:21:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 549. [2022-01-18 16:21:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-01-18 16:21:17,040 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-01-18 16:21:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:17,040 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-01-18 16:21:17,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-01-18 16:21:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:17,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:17,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:17,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 16:21:17,256 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2108456312, now seen corresponding path program 103 times [2022-01-18 16:21:17,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424279742] [2022-01-18 16:21:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:17,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:17,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424279742] [2022-01-18 16:21:17,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424279742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:17,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284324024] [2022-01-18 16:21:17,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:21:17,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:17,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:17,525 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:17,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 16:21:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:17,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:17,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:17,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:18,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:18,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:18,465 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:18,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:18,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284324024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:18,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:18,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:18,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357972603] [2022-01-18 16:21:18,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:18,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:18,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:18,522 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:21,338 INFO L93 Difference]: Finished difference Result 1146 states and 2299 transitions. [2022-01-18 16:21:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-18 16:21:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:21,340 INFO L225 Difference]: With dead ends: 1146 [2022-01-18 16:21:21,340 INFO L226 Difference]: Without dead ends: 1118 [2022-01-18 16:21:21,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1493, Invalid=12549, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:21:21,341 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 241 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:21,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 418 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1932 Invalid, 0 Unknown, 392 Unchecked, 0.7s Time] [2022-01-18 16:21:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-01-18 16:21:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 548. [2022-01-18 16:21:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.045703839122486) internal successors, (1119), 547 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1119 transitions. [2022-01-18 16:21:21,347 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1119 transitions. Word has length 33 [2022-01-18 16:21:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:21,347 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1119 transitions. [2022-01-18 16:21:21,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1119 transitions. [2022-01-18 16:21:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:21,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:21,348 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:21,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:21,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:21,548 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:21,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -457813968, now seen corresponding path program 104 times [2022-01-18 16:21:21,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632277610] [2022-01-18 16:21:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:21,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:21,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:21,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632277610] [2022-01-18 16:21:21,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632277610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316737358] [2022-01-18 16:21:21,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:21:21,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:21,827 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:21,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 16:21:21,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:21,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:22,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:22,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:22,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:22,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:22,766 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:22,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316737358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:22,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:22,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:22,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725134625] [2022-01-18 16:21:22,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:22,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:22,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:22,815 INFO L87 Difference]: Start difference. First operand 548 states and 1119 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:24,610 INFO L93 Difference]: Finished difference Result 873 states and 1752 transitions. [2022-01-18 16:21:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:21:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:24,611 INFO L225 Difference]: With dead ends: 873 [2022-01-18 16:21:24,611 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 16:21:24,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=630, Invalid=6012, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:21:24,612 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:24,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 431 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1775 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2022-01-18 16:21:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 16:21:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 549. [2022-01-18 16:21:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-01-18 16:21:24,617 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-01-18 16:21:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:24,617 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-01-18 16:21:24,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-01-18 16:21:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:24,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:24,618 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:24,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:24,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:24,832 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 968428398, now seen corresponding path program 105 times [2022-01-18 16:21:24,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983919600] [2022-01-18 16:21:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:24,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:25,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983919600] [2022-01-18 16:21:25,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983919600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620845619] [2022-01-18 16:21:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:25,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:25,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:25,072 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:25,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 16:21:25,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:21:25,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:25,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:21:25,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:25,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:25,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:25,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:25,840 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:25,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:21:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:25,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620845619] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:25,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:25,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:21:25,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071384665] [2022-01-18 16:21:25,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:25,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:21:25,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:21:25,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:21:25,881 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:28,415 INFO L93 Difference]: Finished difference Result 1055 states and 2099 transitions. [2022-01-18 16:21:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:21:28,415 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:28,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:28,416 INFO L225 Difference]: With dead ends: 1055 [2022-01-18 16:21:28,416 INFO L226 Difference]: Without dead ends: 985 [2022-01-18 16:21:28,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1429, Invalid=12377, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 16:21:28,418 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 325 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:28,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 423 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2559 Invalid, 0 Unknown, 102 Unchecked, 0.7s Time] [2022-01-18 16:21:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-01-18 16:21:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 557. [2022-01-18 16:21:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.0449640287769784) internal successors, (1137), 556 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1137 transitions. [2022-01-18 16:21:28,423 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1137 transitions. Word has length 33 [2022-01-18 16:21:28,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:28,423 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 1137 transitions. [2022-01-18 16:21:28,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1137 transitions. [2022-01-18 16:21:28,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:28,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:28,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:28,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-01-18 16:21:28,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-01-18 16:21:28,625 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:28,625 INFO L85 PathProgramCache]: Analyzing trace with hash 420173180, now seen corresponding path program 106 times [2022-01-18 16:21:28,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:28,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855311951] [2022-01-18 16:21:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:28,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:28,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855311951] [2022-01-18 16:21:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855311951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:28,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787303051] [2022-01-18 16:21:28,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:28,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:28,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:28,913 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:28,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 16:21:28,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:28,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:28,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:29,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:29,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:29,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:29,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:29,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787303051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:29,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:29,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:29,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074674298] [2022-01-18 16:21:29,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:29,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:29,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:29,908 INFO L87 Difference]: Start difference. First operand 557 states and 1137 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:31,506 INFO L93 Difference]: Finished difference Result 903 states and 1811 transitions. [2022-01-18 16:21:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:21:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:31,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:31,507 INFO L225 Difference]: With dead ends: 903 [2022-01-18 16:21:31,507 INFO L226 Difference]: Without dead ends: 855 [2022-01-18 16:21:31,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=629, Invalid=6681, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:21:31,508 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 208 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:31,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 394 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1629 Invalid, 0 Unknown, 178 Unchecked, 0.6s Time] [2022-01-18 16:21:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-18 16:21:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 561. [2022-01-18 16:21:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-01-18 16:21:31,519 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-01-18 16:21:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-01-18 16:21:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-01-18 16:21:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:31,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:31,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:31,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:31,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 16:21:31,735 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1805795770, now seen corresponding path program 107 times [2022-01-18 16:21:31,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:31,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824153738] [2022-01-18 16:21:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:31,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:32,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:32,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824153738] [2022-01-18 16:21:32,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824153738] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:32,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842230396] [2022-01-18 16:21:32,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:32,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:32,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:32,008 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:32,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 16:21:32,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:21:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:21:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:32,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:32,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:21:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:32,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:32,964 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:32,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:33,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842230396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:33,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295846044] [2022-01-18 16:21:33,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:33,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:33,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:33,020 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:35,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:35,632 INFO L93 Difference]: Finished difference Result 1060 states and 2131 transitions. [2022-01-18 16:21:35,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:21:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:35,633 INFO L225 Difference]: With dead ends: 1060 [2022-01-18 16:21:35,633 INFO L226 Difference]: Without dead ends: 1006 [2022-01-18 16:21:35,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=875, Invalid=9025, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:21:35,634 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:35,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 621 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2026 Invalid, 0 Unknown, 754 Unchecked, 0.8s Time] [2022-01-18 16:21:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-01-18 16:21:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 561. [2022-01-18 16:21:35,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-01-18 16:21:35,640 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-01-18 16:21:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:35,640 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-01-18 16:21:35,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-01-18 16:21:35,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:35,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:35,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:35,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:35,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 16:21:35,855 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1164685180, now seen corresponding path program 108 times [2022-01-18 16:21:35,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:35,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227674003] [2022-01-18 16:21:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:35,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:36,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227674003] [2022-01-18 16:21:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227674003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:36,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768719078] [2022-01-18 16:21:36,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:21:36,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:36,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:36,118 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:36,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 16:21:36,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:21:36,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:21:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:36,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:21:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:36,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:37,044 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:37,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768719078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:37,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:37,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175762539] [2022-01-18 16:21:37,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:37,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:37,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:37,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:37,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:37,101 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:40,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:40,844 INFO L93 Difference]: Finished difference Result 1152 states and 2296 transitions. [2022-01-18 16:21:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:21:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:40,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:40,845 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 16:21:40,845 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 16:21:40,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1471, Invalid=14029, Unknown=0, NotChecked=0, Total=15500 [2022-01-18 16:21:40,846 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 337 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:40,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 623 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2672 Invalid, 0 Unknown, 68 Unchecked, 1.0s Time] [2022-01-18 16:21:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 16:21:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 575. [2022-01-18 16:21:40,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.043554006968641) internal successors, (1173), 574 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1173 transitions. [2022-01-18 16:21:40,852 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1173 transitions. Word has length 33 [2022-01-18 16:21:40,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:40,852 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1173 transitions. [2022-01-18 16:21:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1173 transitions. [2022-01-18 16:21:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:40,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:40,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:40,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:41,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 16:21:41,061 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:41,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1704039750, now seen corresponding path program 109 times [2022-01-18 16:21:41,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:41,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521075897] [2022-01-18 16:21:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:41,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:41,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521075897] [2022-01-18 16:21:41,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521075897] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80848034] [2022-01-18 16:21:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:21:41,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:41,360 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:41,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:41,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 16:21:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:41,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:41,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:41,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:42,315 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:42,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:42,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80848034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:42,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:42,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:42,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29896196] [2022-01-18 16:21:42,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:42,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:42,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:42,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:42,377 INFO L87 Difference]: Start difference. First operand 575 states and 1173 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:44,530 INFO L93 Difference]: Finished difference Result 1057 states and 2120 transitions. [2022-01-18 16:21:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:21:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:44,531 INFO L225 Difference]: With dead ends: 1057 [2022-01-18 16:21:44,531 INFO L226 Difference]: Without dead ends: 1029 [2022-01-18 16:21:44,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1101, Invalid=9405, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:21:44,532 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 272 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:44,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 384 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1517 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-01-18 16:21:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-01-18 16:21:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 574. [2022-01-18 16:21:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.043630017452007) internal successors, (1171), 573 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1171 transitions. [2022-01-18 16:21:44,541 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1171 transitions. Word has length 33 [2022-01-18 16:21:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:44,541 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1171 transitions. [2022-01-18 16:21:44,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1171 transitions. [2022-01-18 16:21:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:44,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:44,542 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:44,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:44,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:44,755 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:44,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1781141418, now seen corresponding path program 110 times [2022-01-18 16:21:44,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:44,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081698488] [2022-01-18 16:21:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:44,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:44,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:45,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081698488] [2022-01-18 16:21:45,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081698488] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:45,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165727147] [2022-01-18 16:21:45,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:21:45,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:45,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:45,017 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:45,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 16:21:45,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:21:45,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:45,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:45,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:45,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:45,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:45,936 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:45,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:45,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165727147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:45,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:45,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:45,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257680982] [2022-01-18 16:21:45,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:45,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:45,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:45,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:45,997 INFO L87 Difference]: Start difference. First operand 574 states and 1171 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:49,027 INFO L93 Difference]: Finished difference Result 1188 states and 2369 transitions. [2022-01-18 16:21:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:21:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:49,028 INFO L225 Difference]: With dead ends: 1188 [2022-01-18 16:21:49,028 INFO L226 Difference]: Without dead ends: 1132 [2022-01-18 16:21:49,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1268, Invalid=11388, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:21:49,029 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:49,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 484 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1895 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-01-18 16:21:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-18 16:21:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 579. [2022-01-18 16:21:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.046712802768166) internal successors, (1183), 578 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1183 transitions. [2022-01-18 16:21:49,036 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1183 transitions. Word has length 33 [2022-01-18 16:21:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1183 transitions. [2022-01-18 16:21:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1183 transitions. [2022-01-18 16:21:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:49,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:49,036 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:49,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:49,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:49,251 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -785128862, now seen corresponding path program 111 times [2022-01-18 16:21:49,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804692599] [2022-01-18 16:21:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:49,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:49,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:49,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804692599] [2022-01-18 16:21:49,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804692599] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328823633] [2022-01-18 16:21:49,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:21:49,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:49,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:49,510 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:49,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 16:21:49,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:21:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:49,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:49,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:49,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:49,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:50,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:50,423 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:50,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:50,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328823633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:50,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:50,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:50,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830826308] [2022-01-18 16:21:50,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:50,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:50,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:50,473 INFO L87 Difference]: Start difference. First operand 579 states and 1183 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:53,191 INFO L93 Difference]: Finished difference Result 1103 states and 2209 transitions. [2022-01-18 16:21:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 16:21:53,192 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:53,193 INFO L225 Difference]: With dead ends: 1103 [2022-01-18 16:21:53,193 INFO L226 Difference]: Without dead ends: 1039 [2022-01-18 16:21:53,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1048, Invalid=9872, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:21:53,194 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:53,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 493 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2419 Invalid, 0 Unknown, 192 Unchecked, 0.9s Time] [2022-01-18 16:21:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-01-18 16:21:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 601. [2022-01-18 16:21:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.0433333333333334) internal successors, (1226), 600 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1226 transitions. [2022-01-18 16:21:53,200 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1226 transitions. Word has length 33 [2022-01-18 16:21:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:53,200 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1226 transitions. [2022-01-18 16:21:53,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1226 transitions. [2022-01-18 16:21:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:53,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:53,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:53,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-01-18 16:21:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-01-18 16:21:53,401 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 641113504, now seen corresponding path program 112 times [2022-01-18 16:21:53,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:53,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344404708] [2022-01-18 16:21:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:53,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:53,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344404708] [2022-01-18 16:21:53,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344404708] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:53,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241429273] [2022-01-18 16:21:53,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:21:53,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:53,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:53,667 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:53,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 16:21:53,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:21:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:21:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:53,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:53,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:53,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:21:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:54,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:54,428 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:54,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241429273] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:54,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132421619] [2022-01-18 16:21:54,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:54,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:54,462 INFO L87 Difference]: Start difference. First operand 601 states and 1226 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:21:57,965 INFO L93 Difference]: Finished difference Result 1153 states and 2288 transitions. [2022-01-18 16:21:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-18 16:21:57,965 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:21:57,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:21:57,966 INFO L225 Difference]: With dead ends: 1153 [2022-01-18 16:21:57,966 INFO L226 Difference]: Without dead ends: 1069 [2022-01-18 16:21:57,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5495 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1663, Invalid=15629, Unknown=0, NotChecked=0, Total=17292 [2022-01-18 16:21:57,968 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 376 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:21:57,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 402 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2331 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-01-18 16:21:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-01-18 16:21:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 611. [2022-01-18 16:21:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.040983606557377) internal successors, (1245), 610 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1245 transitions. [2022-01-18 16:21:57,974 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1245 transitions. Word has length 33 [2022-01-18 16:21:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:21:57,974 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1245 transitions. [2022-01-18 16:21:57,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:21:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1245 transitions. [2022-01-18 16:21:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:21:57,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:21:57,975 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:21:57,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 16:21:58,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,175 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:21:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:21:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1676294800, now seen corresponding path program 113 times [2022-01-18 16:21:58,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:21:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440163128] [2022-01-18 16:21:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:21:58,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:21:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:21:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:21:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440163128] [2022-01-18 16:21:58,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440163128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:21:58,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507711826] [2022-01-18 16:21:58,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:21:58,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:21:58,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:21:58,443 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:21:58,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 16:21:58,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:21:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:21:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:21:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:21:58,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:21:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:21:58,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:21:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:58,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:21:59,383 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:21:59,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:21:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:21:59,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507711826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:21:59,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:21:59,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:21:59,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039108325] [2022-01-18 16:21:59,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:21:59,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:21:59,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:21:59,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:21:59,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:21:59,429 INFO L87 Difference]: Start difference. First operand 611 states and 1245 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:02,178 INFO L93 Difference]: Finished difference Result 1094 states and 2178 transitions. [2022-01-18 16:22:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:22:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:02,179 INFO L225 Difference]: With dead ends: 1094 [2022-01-18 16:22:02,179 INFO L226 Difference]: Without dead ends: 1010 [2022-01-18 16:22:02,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1266, Invalid=12306, Unknown=0, NotChecked=0, Total=13572 [2022-01-18 16:22:02,180 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 334 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:02,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 450 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2389 Invalid, 0 Unknown, 146 Unchecked, 0.8s Time] [2022-01-18 16:22:02,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-01-18 16:22:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 619. [2022-01-18 16:22:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.0388349514563107) internal successors, (1260), 618 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1260 transitions. [2022-01-18 16:22:02,186 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1260 transitions. Word has length 33 [2022-01-18 16:22:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:02,186 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1260 transitions. [2022-01-18 16:22:02,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1260 transitions. [2022-01-18 16:22:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:02,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:02,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:02,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-18 16:22:02,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:02,399 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:02,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1392173570, now seen corresponding path program 114 times [2022-01-18 16:22:02,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:02,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215268291] [2022-01-18 16:22:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:02,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:02,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215268291] [2022-01-18 16:22:02,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215268291] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473011121] [2022-01-18 16:22:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:02,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:02,677 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:02,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 16:22:02,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:22:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:02,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:03,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:03,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:22:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:03,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:03,795 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:03,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:22:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:03,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473011121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:03,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:03,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:22:03,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210037865] [2022-01-18 16:22:03,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:03,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:22:03,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:03,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:22:03,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:22:03,852 INFO L87 Difference]: Start difference. First operand 619 states and 1260 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:06,032 INFO L93 Difference]: Finished difference Result 968 states and 1927 transitions. [2022-01-18 16:22:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:22:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:06,034 INFO L225 Difference]: With dead ends: 968 [2022-01-18 16:22:06,034 INFO L226 Difference]: Without dead ends: 935 [2022-01-18 16:22:06,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=774, Invalid=7968, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:22:06,034 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:06,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 488 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1953 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2022-01-18 16:22:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-01-18 16:22:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 638. [2022-01-18 16:22:06,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.0313971742543173) internal successors, (1294), 637 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1294 transitions. [2022-01-18 16:22:06,040 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1294 transitions. Word has length 33 [2022-01-18 16:22:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1294 transitions. [2022-01-18 16:22:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1294 transitions. [2022-01-18 16:22:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:06,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:06,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:06,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:06,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 16:22:06,242 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1427176148, now seen corresponding path program 115 times [2022-01-18 16:22:06,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188924958] [2022-01-18 16:22:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:06,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:06,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188924958] [2022-01-18 16:22:06,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188924958] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:06,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118398011] [2022-01-18 16:22:06,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:06,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:06,515 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:06,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 16:22:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:06,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:06,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:06,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:06,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:07,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:07,504 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:07,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:07,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118398011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:07,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:07,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:07,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427708596] [2022-01-18 16:22:07,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:07,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:07,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:07,554 INFO L87 Difference]: Start difference. First operand 638 states and 1294 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:09,481 INFO L93 Difference]: Finished difference Result 995 states and 1973 transitions. [2022-01-18 16:22:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:22:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:09,482 INFO L225 Difference]: With dead ends: 995 [2022-01-18 16:22:09,483 INFO L226 Difference]: Without dead ends: 897 [2022-01-18 16:22:09,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=698, Invalid=7492, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:22:09,483 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:09,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 485 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1869 Invalid, 0 Unknown, 394 Unchecked, 0.6s Time] [2022-01-18 16:22:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-01-18 16:22:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 623. [2022-01-18 16:22:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.036977491961415) internal successors, (1267), 622 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1267 transitions. [2022-01-18 16:22:09,489 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1267 transitions. Word has length 33 [2022-01-18 16:22:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:09,489 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1267 transitions. [2022-01-18 16:22:09,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1267 transitions. [2022-01-18 16:22:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:09,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:09,490 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:09,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:09,705 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1435416782, now seen corresponding path program 116 times [2022-01-18 16:22:09,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:09,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13052476] [2022-01-18 16:22:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:09,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:09,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13052476] [2022-01-18 16:22:09,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13052476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421921750] [2022-01-18 16:22:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:09,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:09,898 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:09,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 16:22:09,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:09,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:10,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:10,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:10,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:10,577 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:10,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:10,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421921750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:10,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:10,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:10,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765774189] [2022-01-18 16:22:10,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:10,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:10,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:10,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:10,618 INFO L87 Difference]: Start difference. First operand 623 states and 1267 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:11,987 INFO L93 Difference]: Finished difference Result 1006 states and 2022 transitions. [2022-01-18 16:22:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:22:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:11,988 INFO L225 Difference]: With dead ends: 1006 [2022-01-18 16:22:11,988 INFO L226 Difference]: Without dead ends: 970 [2022-01-18 16:22:11,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=685, Invalid=7147, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:22:11,989 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:11,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 370 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1364 Invalid, 0 Unknown, 440 Unchecked, 0.4s Time] [2022-01-18 16:22:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-01-18 16:22:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 619. [2022-01-18 16:22:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.033980582524272) internal successors, (1257), 618 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1257 transitions. [2022-01-18 16:22:11,994 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1257 transitions. Word has length 33 [2022-01-18 16:22:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:11,994 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1257 transitions. [2022-01-18 16:22:11,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1257 transitions. [2022-01-18 16:22:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:11,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:11,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:12,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:12,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:12,210 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1679711078, now seen corresponding path program 117 times [2022-01-18 16:22:12,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:12,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891909539] [2022-01-18 16:22:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:12,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:12,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891909539] [2022-01-18 16:22:12,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891909539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:12,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121702361] [2022-01-18 16:22:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:12,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:12,396 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:12,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 16:22:12,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:22:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:12,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:12,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:12,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:12,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:12,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:12,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:13,059 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:13,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:13,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121702361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:13,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:13,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:13,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073157242] [2022-01-18 16:22:13,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:13,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:13,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:13,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:13,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:13,094 INFO L87 Difference]: Start difference. First operand 619 states and 1257 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:16,240 INFO L93 Difference]: Finished difference Result 1196 states and 2379 transitions. [2022-01-18 16:22:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-18 16:22:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:16,241 INFO L225 Difference]: With dead ends: 1196 [2022-01-18 16:22:16,241 INFO L226 Difference]: Without dead ends: 1129 [2022-01-18 16:22:16,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6916 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1387, Invalid=17795, Unknown=0, NotChecked=0, Total=19182 [2022-01-18 16:22:16,242 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 295 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:16,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 490 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2375 Invalid, 0 Unknown, 460 Unchecked, 0.7s Time] [2022-01-18 16:22:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-01-18 16:22:16,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 671. [2022-01-18 16:22:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.0283582089552237) internal successors, (1359), 670 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1359 transitions. [2022-01-18 16:22:16,249 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1359 transitions. Word has length 33 [2022-01-18 16:22:16,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:16,249 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1359 transitions. [2022-01-18 16:22:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1359 transitions. [2022-01-18 16:22:16,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:16,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:16,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:16,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:16,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 16:22:16,464 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:16,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1410568192, now seen corresponding path program 118 times [2022-01-18 16:22:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:16,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969941687] [2022-01-18 16:22:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:16,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:16,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969941687] [2022-01-18 16:22:16,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969941687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18107870] [2022-01-18 16:22:16,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:16,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:16,742 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:16,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 16:22:16,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:16,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:17,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:17,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:17,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:17,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:17,579 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:17,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:17,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18107870] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:17,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:17,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:17,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902617084] [2022-01-18 16:22:17,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:17,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:17,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:17,617 INFO L87 Difference]: Start difference. First operand 671 states and 1359 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:21,593 INFO L93 Difference]: Finished difference Result 1327 states and 2613 transitions. [2022-01-18 16:22:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-18 16:22:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:21,595 INFO L225 Difference]: With dead ends: 1327 [2022-01-18 16:22:21,595 INFO L226 Difference]: Without dead ends: 1200 [2022-01-18 16:22:21,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8265 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1775, Invalid=22095, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 16:22:21,596 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 349 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:21,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 734 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 3518 Invalid, 0 Unknown, 197 Unchecked, 1.1s Time] [2022-01-18 16:22:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-01-18 16:22:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 663. [2022-01-18 16:22:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.027190332326284) internal successors, (1342), 662 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1342 transitions. [2022-01-18 16:22:21,603 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1342 transitions. Word has length 33 [2022-01-18 16:22:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1342 transitions. [2022-01-18 16:22:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1342 transitions. [2022-01-18 16:22:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:21,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:21,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:21,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:21,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:21,816 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:21,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1038600488, now seen corresponding path program 119 times [2022-01-18 16:22:21,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428918474] [2022-01-18 16:22:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:21,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:22,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428918474] [2022-01-18 16:22:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428918474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317963304] [2022-01-18 16:22:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:22:22,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:22,085 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 16:22:22,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:22:22,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:22:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:22,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:22,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:22,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:23,137 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:23,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:22:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:23,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317963304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:23,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:23,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:22:23,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462312860] [2022-01-18 16:22:23,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:23,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:22:23,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:22:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:22:23,191 INFO L87 Difference]: Start difference. First operand 663 states and 1342 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:29,643 INFO L93 Difference]: Finished difference Result 1281 states and 2543 transitions. [2022-01-18 16:22:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 16:22:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:29,644 INFO L225 Difference]: With dead ends: 1281 [2022-01-18 16:22:29,644 INFO L226 Difference]: Without dead ends: 1217 [2022-01-18 16:22:29,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9595 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1969, Invalid=24763, Unknown=0, NotChecked=0, Total=26732 [2022-01-18 16:22:29,645 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 340 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 3772 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:29,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 601 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3772 Invalid, 0 Unknown, 398 Unchecked, 1.4s Time] [2022-01-18 16:22:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-01-18 16:22:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 668. [2022-01-18 16:22:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.028485757121439) internal successors, (1353), 667 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1353 transitions. [2022-01-18 16:22:29,655 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1353 transitions. Word has length 33 [2022-01-18 16:22:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:29,655 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1353 transitions. [2022-01-18 16:22:29,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1353 transitions. [2022-01-18 16:22:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:29,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:29,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:29,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:29,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 16:22:29,872 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:29,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1830124442, now seen corresponding path program 120 times [2022-01-18 16:22:29,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:29,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745430504] [2022-01-18 16:22:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:29,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:30,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745430504] [2022-01-18 16:22:30,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745430504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817204651] [2022-01-18 16:22:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:22:30,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:30,144 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:30,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 16:22:30,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:22:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:22:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:30,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:30,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:22:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:30,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:31,056 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:31,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:31,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817204651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:31,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:31,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:31,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804628989] [2022-01-18 16:22:31,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:31,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:31,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:31,107 INFO L87 Difference]: Start difference. First operand 668 states and 1353 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:37,754 INFO L93 Difference]: Finished difference Result 1461 states and 2885 transitions. [2022-01-18 16:22:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-18 16:22:37,755 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:37,756 INFO L225 Difference]: With dead ends: 1461 [2022-01-18 16:22:37,756 INFO L226 Difference]: Without dead ends: 1361 [2022-01-18 16:22:37,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10672 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2766, Invalid=26646, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 16:22:37,771 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 421 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 4936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:37,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 928 Invalid, 4936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4097 Invalid, 0 Unknown, 538 Unchecked, 1.6s Time] [2022-01-18 16:22:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-18 16:22:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 730. [2022-01-18 16:22:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.0205761316872426) internal successors, (1473), 729 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1473 transitions. [2022-01-18 16:22:37,779 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1473 transitions. Word has length 33 [2022-01-18 16:22:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:37,779 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1473 transitions. [2022-01-18 16:22:37,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1473 transitions. [2022-01-18 16:22:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:37,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:37,780 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:37,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:37,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-01-18 16:22:37,994 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -456720104, now seen corresponding path program 121 times [2022-01-18 16:22:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:37,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837728202] [2022-01-18 16:22:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:37,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:38,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837728202] [2022-01-18 16:22:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837728202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069791227] [2022-01-18 16:22:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:22:38,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:38,211 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 16:22:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:38,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:38,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:38,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:38,848 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:38,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:38,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069791227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:38,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:38,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:38,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497559531] [2022-01-18 16:22:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:38,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:38,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:38,888 INFO L87 Difference]: Start difference. First operand 730 states and 1473 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:43,821 INFO L93 Difference]: Finished difference Result 1337 states and 2659 transitions. [2022-01-18 16:22:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-18 16:22:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:43,822 INFO L225 Difference]: With dead ends: 1337 [2022-01-18 16:22:43,822 INFO L226 Difference]: Without dead ends: 1281 [2022-01-18 16:22:43,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7430 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2074, Invalid=19388, Unknown=0, NotChecked=0, Total=21462 [2022-01-18 16:22:43,823 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 363 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:43,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 566 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2788 Invalid, 0 Unknown, 597 Unchecked, 1.1s Time] [2022-01-18 16:22:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-01-18 16:22:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 694. [2022-01-18 16:22:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.0274170274170276) internal successors, (1405), 693 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1405 transitions. [2022-01-18 16:22:43,830 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1405 transitions. Word has length 33 [2022-01-18 16:22:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:43,830 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1405 transitions. [2022-01-18 16:22:43,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1405 transitions. [2022-01-18 16:22:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:43,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:43,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:43,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:44,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 16:22:44,043 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash -101427426, now seen corresponding path program 122 times [2022-01-18 16:22:44,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:44,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73876366] [2022-01-18 16:22:44,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:44,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:44,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73876366] [2022-01-18 16:22:44,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73876366] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858925139] [2022-01-18 16:22:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:22:44,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:44,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:44,296 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:44,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 16:22:44,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:22:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:44,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:44,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:44,937 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:44,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:44,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858925139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:44,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:44,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:44,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655911446] [2022-01-18 16:22:44,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:44,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:44,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:44,978 INFO L87 Difference]: Start difference. First operand 694 states and 1405 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:48,867 INFO L93 Difference]: Finished difference Result 1283 states and 2512 transitions. [2022-01-18 16:22:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 16:22:48,867 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:48,868 INFO L225 Difference]: With dead ends: 1283 [2022-01-18 16:22:48,868 INFO L226 Difference]: Without dead ends: 1178 [2022-01-18 16:22:48,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1728, Invalid=20028, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:22:48,869 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:48,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 603 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3496 Invalid, 0 Unknown, 11 Unchecked, 1.2s Time] [2022-01-18 16:22:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-01-18 16:22:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 706. [2022-01-18 16:22:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.022695035460993) internal successors, (1426), 705 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1426 transitions. [2022-01-18 16:22:48,876 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1426 transitions. Word has length 33 [2022-01-18 16:22:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:48,877 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1426 transitions. [2022-01-18 16:22:48,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1426 transitions. [2022-01-18 16:22:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:48,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:48,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:48,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:49,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:49,092 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:49,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1324814940, now seen corresponding path program 123 times [2022-01-18 16:22:49,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658586675] [2022-01-18 16:22:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:49,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:49,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658586675] [2022-01-18 16:22:49,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658586675] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795332283] [2022-01-18 16:22:49,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:22:49,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:49,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:49,319 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 16:22:49,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:22:49,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:49,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:49,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:49,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:49,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:50,176 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:50,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:50,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795332283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:50,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:50,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:50,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863390147] [2022-01-18 16:22:50,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:50,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:50,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:50,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:50,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:50,234 INFO L87 Difference]: Start difference. First operand 706 states and 1426 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:55,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:22:55,776 INFO L93 Difference]: Finished difference Result 1306 states and 2578 transitions. [2022-01-18 16:22:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-18 16:22:55,777 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:22:55,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:22:55,778 INFO L225 Difference]: With dead ends: 1306 [2022-01-18 16:22:55,778 INFO L226 Difference]: Without dead ends: 1238 [2022-01-18 16:22:55,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10719 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2619, Invalid=27483, Unknown=0, NotChecked=0, Total=30102 [2022-01-18 16:22:55,780 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 405 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:22:55,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 453 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3158 Invalid, 0 Unknown, 89 Unchecked, 1.2s Time] [2022-01-18 16:22:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-01-18 16:22:55,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 716. [2022-01-18 16:22:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.018181818181818) internal successors, (1443), 715 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1443 transitions. [2022-01-18 16:22:55,788 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1443 transitions. Word has length 33 [2022-01-18 16:22:55,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:22:55,788 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1443 transitions. [2022-01-18 16:22:55,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:22:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1443 transitions. [2022-01-18 16:22:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:22:55,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:22:55,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:22:55,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-18 16:22:55,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:55,994 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:22:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:22:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1934971060, now seen corresponding path program 124 times [2022-01-18 16:22:55,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:22:55,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707750633] [2022-01-18 16:22:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:22:55,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:22:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:22:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:56,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:22:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707750633] [2022-01-18 16:22:56,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707750633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:22:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954722795] [2022-01-18 16:22:56,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:22:56,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:22:56,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:22:56,275 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:22:56,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 16:22:56,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:22:56,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:22:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:22:56,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:22:56,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:22:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:22:56,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:22:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:56,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:22:57,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:22:57,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:22:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:22:57,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954722795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:22:57,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:22:57,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:22:57,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787205092] [2022-01-18 16:22:57,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:22:57,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:22:57,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:22:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:22:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:22:57,237 INFO L87 Difference]: Start difference. First operand 716 states and 1443 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:01,844 INFO L93 Difference]: Finished difference Result 1257 states and 2482 transitions. [2022-01-18 16:23:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-18 16:23:01,844 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:01,845 INFO L225 Difference]: With dead ends: 1257 [2022-01-18 16:23:01,845 INFO L226 Difference]: Without dead ends: 1189 [2022-01-18 16:23:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7412 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1859, Invalid=20491, Unknown=0, NotChecked=0, Total=22350 [2022-01-18 16:23:01,846 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 328 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:01,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 427 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2509 Invalid, 0 Unknown, 233 Unchecked, 1.0s Time] [2022-01-18 16:23:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-01-18 16:23:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 723. [2022-01-18 16:23:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.0166204986149583) internal successors, (1456), 722 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1456 transitions. [2022-01-18 16:23:01,853 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1456 transitions. Word has length 33 [2022-01-18 16:23:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:01,853 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1456 transitions. [2022-01-18 16:23:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1456 transitions. [2022-01-18 16:23:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:01,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:01,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:01,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:02,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 16:23:02,069 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:02,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1614609616, now seen corresponding path program 125 times [2022-01-18 16:23:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:02,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740893910] [2022-01-18 16:23:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:02,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:02,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740893910] [2022-01-18 16:23:02,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740893910] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:02,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347511814] [2022-01-18 16:23:02,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:02,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:02,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:02,350 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:02,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:23:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:02,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 16:23:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:02,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:03,215 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:03,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347511814] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:03,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:03,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:03,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82512935] [2022-01-18 16:23:03,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:03,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:03,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:03,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:03,253 INFO L87 Difference]: Start difference. First operand 723 states and 1456 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:04,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:04,239 INFO L93 Difference]: Finished difference Result 1091 states and 2133 transitions. [2022-01-18 16:23:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:23:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:04,241 INFO L225 Difference]: With dead ends: 1091 [2022-01-18 16:23:04,241 INFO L226 Difference]: Without dead ends: 1027 [2022-01-18 16:23:04,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=4716, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:23:04,241 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:04,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 850 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1632 Invalid, 0 Unknown, 208 Unchecked, 0.4s Time] [2022-01-18 16:23:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-01-18 16:23:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 738. [2022-01-18 16:23:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-01-18 16:23:04,248 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-01-18 16:23:04,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:04,248 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-01-18 16:23:04,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:04,248 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-01-18 16:23:04,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:04,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:04,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:04,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:04,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-01-18 16:23:04,463 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -60860770, now seen corresponding path program 126 times [2022-01-18 16:23:04,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:04,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117978956] [2022-01-18 16:23:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:04,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:04,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117978956] [2022-01-18 16:23:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117978956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266135577] [2022-01-18 16:23:04,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:04,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:04,691 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:04,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 16:23:04,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:23:04,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:04,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:05,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:05,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:05,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:05,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:05,693 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:05,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:05,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266135577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:05,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:05,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:05,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534600759] [2022-01-18 16:23:05,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:05,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:05,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:05,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:05,757 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:07,041 INFO L93 Difference]: Finished difference Result 1131 states and 2245 transitions. [2022-01-18 16:23:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:23:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:07,042 INFO L225 Difference]: With dead ends: 1131 [2022-01-18 16:23:07,042 INFO L226 Difference]: Without dead ends: 1124 [2022-01-18 16:23:07,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=4832, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:23:07,043 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:07,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 520 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1117 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-01-18 16:23:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-01-18 16:23:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 754. [2022-01-18 16:23:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0212483399734396) internal successors, (1522), 753 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1522 transitions. [2022-01-18 16:23:07,050 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1522 transitions. Word has length 33 [2022-01-18 16:23:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:07,050 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1522 transitions. [2022-01-18 16:23:07,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1522 transitions. [2022-01-18 16:23:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:07,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:07,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:07,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:07,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:07,265 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:07,265 INFO L85 PathProgramCache]: Analyzing trace with hash -837246742, now seen corresponding path program 127 times [2022-01-18 16:23:07,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376342809] [2022-01-18 16:23:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:07,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:07,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376342809] [2022-01-18 16:23:07,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376342809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460018921] [2022-01-18 16:23:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:07,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:07,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:07,534 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:07,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 16:23:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:07,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:07,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:07,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:07,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:07,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:08,216 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:08,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:08,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460018921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:08,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:08,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:08,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36391308] [2022-01-18 16:23:08,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:08,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:08,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:08,266 INFO L87 Difference]: Start difference. First operand 754 states and 1522 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:09,492 INFO L93 Difference]: Finished difference Result 1118 states and 2216 transitions. [2022-01-18 16:23:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:23:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:09,493 INFO L225 Difference]: With dead ends: 1118 [2022-01-18 16:23:09,493 INFO L226 Difference]: Without dead ends: 1086 [2022-01-18 16:23:09,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:23:09,494 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:09,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 437 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1074 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-01-18 16:23:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-01-18 16:23:09,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 761. [2022-01-18 16:23:09,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.011842105263158) internal successors, (1529), 760 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1529 transitions. [2022-01-18 16:23:09,500 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1529 transitions. Word has length 33 [2022-01-18 16:23:09,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1529 transitions. [2022-01-18 16:23:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1529 transitions. [2022-01-18 16:23:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:09,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:09,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:09,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:09,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,715 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -461564830, now seen corresponding path program 128 times [2022-01-18 16:23:09,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:09,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869481370] [2022-01-18 16:23:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:09,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:09,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869481370] [2022-01-18 16:23:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869481370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752748370] [2022-01-18 16:23:09,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:09,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:09,987 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:09,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 16:23:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:10,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:10,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:10,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:10,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:10,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:10,850 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:10,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:10,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752748370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:10,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:10,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:10,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747704738] [2022-01-18 16:23:10,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:10,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:10,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:10,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:10,890 INFO L87 Difference]: Start difference. First operand 761 states and 1529 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:11,906 INFO L93 Difference]: Finished difference Result 1236 states and 2406 transitions. [2022-01-18 16:23:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:23:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:11,907 INFO L225 Difference]: With dead ends: 1236 [2022-01-18 16:23:11,907 INFO L226 Difference]: Without dead ends: 1140 [2022-01-18 16:23:11,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=5403, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:23:11,908 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:11,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 487 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1253 Invalid, 0 Unknown, 380 Unchecked, 0.3s Time] [2022-01-18 16:23:11,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-01-18 16:23:11,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 757. [2022-01-18 16:23:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.009259259259259) internal successors, (1519), 756 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1519 transitions. [2022-01-18 16:23:11,915 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1519 transitions. Word has length 33 [2022-01-18 16:23:11,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:11,915 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1519 transitions. [2022-01-18 16:23:11,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1519 transitions. [2022-01-18 16:23:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:11,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:11,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:11,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 16:23:12,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 16:23:12,130 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:12,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1803233456, now seen corresponding path program 129 times [2022-01-18 16:23:12,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294272892] [2022-01-18 16:23:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:12,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:12,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:12,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294272892] [2022-01-18 16:23:12,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294272892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:12,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358545338] [2022-01-18 16:23:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:12,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:12,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:12,433 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:12,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 16:23:12,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:23:12,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:12,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:23:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:12,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:12,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:13,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:13,448 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:13,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:13,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358545338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:13,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:13,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:13,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005095057] [2022-01-18 16:23:13,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:13,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:13,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:13,510 INFO L87 Difference]: Start difference. First operand 757 states and 1519 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:14,879 INFO L93 Difference]: Finished difference Result 1127 states and 2221 transitions. [2022-01-18 16:23:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:23:14,879 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:14,881 INFO L225 Difference]: With dead ends: 1127 [2022-01-18 16:23:14,881 INFO L226 Difference]: Without dead ends: 1097 [2022-01-18 16:23:14,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:23:14,881 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 158 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:14,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 592 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1313 Invalid, 0 Unknown, 635 Unchecked, 0.5s Time] [2022-01-18 16:23:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-01-18 16:23:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 738. [2022-01-18 16:23:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-01-18 16:23:14,888 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-01-18 16:23:14,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:14,888 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-01-18 16:23:14,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:14,888 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-01-18 16:23:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:14,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:14,889 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:14,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:15,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 16:23:15,089 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:15,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1400985966, now seen corresponding path program 130 times [2022-01-18 16:23:15,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:15,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860014782] [2022-01-18 16:23:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:15,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:15,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860014782] [2022-01-18 16:23:15,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860014782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:15,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357736592] [2022-01-18 16:23:15,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:15,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:15,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:15,362 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:15,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 16:23:15,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:15,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:15,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:15,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:16,192 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:16,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:16,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357736592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:16,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:16,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303350111] [2022-01-18 16:23:16,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:16,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:16,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:16,236 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:17,460 INFO L93 Difference]: Finished difference Result 1037 states and 2053 transitions. [2022-01-18 16:23:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:23:17,460 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:17,461 INFO L225 Difference]: With dead ends: 1037 [2022-01-18 16:23:17,461 INFO L226 Difference]: Without dead ends: 1004 [2022-01-18 16:23:17,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=4567, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:23:17,462 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:17,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 647 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1405 Invalid, 0 Unknown, 420 Unchecked, 0.5s Time] [2022-01-18 16:23:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-01-18 16:23:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 754. [2022-01-18 16:23:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0119521912350598) internal successors, (1515), 753 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1515 transitions. [2022-01-18 16:23:17,468 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1515 transitions. Word has length 33 [2022-01-18 16:23:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:17,469 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1515 transitions. [2022-01-18 16:23:17,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1515 transitions. [2022-01-18 16:23:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:17,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:17,469 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:17,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:17,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 16:23:17,670 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1848452472, now seen corresponding path program 131 times [2022-01-18 16:23:17,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:17,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003170308] [2022-01-18 16:23:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:17,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:17,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:17,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:17,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003170308] [2022-01-18 16:23:17,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003170308] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:17,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613590642] [2022-01-18 16:23:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:17,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:17,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:17,947 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:17,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 16:23:17,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:23:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:18,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:18,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:18,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:19,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:19,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:23:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:19,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613590642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:19,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:19,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:23:19,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020660059] [2022-01-18 16:23:19,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:19,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:23:19,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:23:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:23:19,173 INFO L87 Difference]: Start difference. First operand 754 states and 1515 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:21,065 INFO L93 Difference]: Finished difference Result 1164 states and 2305 transitions. [2022-01-18 16:23:21,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:23:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:21,067 INFO L225 Difference]: With dead ends: 1164 [2022-01-18 16:23:21,067 INFO L226 Difference]: Without dead ends: 1144 [2022-01-18 16:23:21,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=561, Invalid=6579, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:23:21,068 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:21,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 681 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1796 Invalid, 0 Unknown, 502 Unchecked, 0.7s Time] [2022-01-18 16:23:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-01-18 16:23:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 758. [2022-01-18 16:23:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.0132100396301187) internal successors, (1524), 757 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1524 transitions. [2022-01-18 16:23:21,075 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1524 transitions. Word has length 33 [2022-01-18 16:23:21,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:21,075 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1524 transitions. [2022-01-18 16:23:21,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:21,075 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1524 transitions. [2022-01-18 16:23:21,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:21,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:21,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:21,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 16:23:21,291 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1963111564, now seen corresponding path program 132 times [2022-01-18 16:23:21,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512262517] [2022-01-18 16:23:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:21,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:21,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:21,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512262517] [2022-01-18 16:23:21,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512262517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:21,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428159167] [2022-01-18 16:23:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:21,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:21,564 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 16:23:21,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:23:21,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:21,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:23:21,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:22,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:22,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:23:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:22,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:22,587 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:22,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428159167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:22,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:22,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:22,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489891264] [2022-01-18 16:23:22,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:22,637 INFO L87 Difference]: Start difference. First operand 758 states and 1524 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:23,929 INFO L93 Difference]: Finished difference Result 1176 states and 2344 transitions. [2022-01-18 16:23:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:23:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:23,931 INFO L225 Difference]: With dead ends: 1176 [2022-01-18 16:23:23,931 INFO L226 Difference]: Without dead ends: 1132 [2022-01-18 16:23:23,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=488, Invalid=5364, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:23:23,932 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:23,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 578 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1413 Invalid, 0 Unknown, 563 Unchecked, 0.4s Time] [2022-01-18 16:23:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-18 16:23:23,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 739. [2022-01-18 16:23:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-01-18 16:23:23,938 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-01-18 16:23:23,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:23,938 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-01-18 16:23:23,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:23,938 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-01-18 16:23:23,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:23,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:23,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:23,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:24,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:24,155 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:24,155 INFO L85 PathProgramCache]: Analyzing trace with hash -15363376, now seen corresponding path program 133 times [2022-01-18 16:23:24,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:24,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804016662] [2022-01-18 16:23:24,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:24,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:24,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804016662] [2022-01-18 16:23:24,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804016662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:24,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230759640] [2022-01-18 16:23:24,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:24,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:24,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:24,437 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:24,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 16:23:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:24,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:24,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:24,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:25,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:25,382 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:25,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:25,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230759640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:25,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:25,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:25,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744408153] [2022-01-18 16:23:25,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:25,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:25,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:25,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:25,420 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:27,485 INFO L93 Difference]: Finished difference Result 1419 states and 2829 transitions. [2022-01-18 16:23:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:23:27,486 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:27,487 INFO L225 Difference]: With dead ends: 1419 [2022-01-18 16:23:27,487 INFO L226 Difference]: Without dead ends: 1375 [2022-01-18 16:23:27,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=738, Invalid=8192, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 16:23:27,488 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 203 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:27,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 716 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2113 Invalid, 0 Unknown, 674 Unchecked, 0.7s Time] [2022-01-18 16:23:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-01-18 16:23:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 742. [2022-01-18 16:23:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.020242914979757) internal successors, (1497), 741 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1497 transitions. [2022-01-18 16:23:27,495 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1497 transitions. Word has length 33 [2022-01-18 16:23:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:27,495 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1497 transitions. [2022-01-18 16:23:27,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1497 transitions. [2022-01-18 16:23:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:27,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:27,496 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:27,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 16:23:27,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 16:23:27,709 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash -656473966, now seen corresponding path program 134 times [2022-01-18 16:23:27,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:27,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247743990] [2022-01-18 16:23:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:27,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:27,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:27,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247743990] [2022-01-18 16:23:27,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247743990] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754585809] [2022-01-18 16:23:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:27,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:27,981 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 16:23:28,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:28,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:28,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:28,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:28,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:28,970 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:28,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:29,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754585809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:29,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:29,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011407947] [2022-01-18 16:23:29,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:29,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:29,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:29,032 INFO L87 Difference]: Start difference. First operand 742 states and 1497 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:31,385 INFO L93 Difference]: Finished difference Result 1369 states and 2749 transitions. [2022-01-18 16:23:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:23:31,386 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:31,387 INFO L225 Difference]: With dead ends: 1369 [2022-01-18 16:23:31,387 INFO L226 Difference]: Without dead ends: 1337 [2022-01-18 16:23:31,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=841, Invalid=7531, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:23:31,388 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 225 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 895 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:31,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 666 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1476 Invalid, 0 Unknown, 895 Unchecked, 0.6s Time] [2022-01-18 16:23:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-01-18 16:23:31,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 739. [2022-01-18 16:23:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-01-18 16:23:31,395 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-01-18 16:23:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:31,395 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-01-18 16:23:31,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-01-18 16:23:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:31,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:31,396 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:31,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:31,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-01-18 16:23:31,597 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:31,597 INFO L85 PathProgramCache]: Analyzing trace with hash 769768400, now seen corresponding path program 135 times [2022-01-18 16:23:31,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:31,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034087342] [2022-01-18 16:23:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:31,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:31,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034087342] [2022-01-18 16:23:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034087342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262172418] [2022-01-18 16:23:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:31,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:31,871 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:31,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 16:23:31,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:23:31,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:32,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:32,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:32,880 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:32,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:32,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262172418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:32,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:32,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:32,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141797454] [2022-01-18 16:23:32,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:32,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:32,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:32,944 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:36,112 INFO L93 Difference]: Finished difference Result 1452 states and 2890 transitions. [2022-01-18 16:23:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:23:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:36,114 INFO L225 Difference]: With dead ends: 1452 [2022-01-18 16:23:36,114 INFO L226 Difference]: Without dead ends: 1424 [2022-01-18 16:23:36,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1182, Invalid=9738, Unknown=0, NotChecked=0, Total=10920 [2022-01-18 16:23:36,115 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 287 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:36,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 717 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1775 Invalid, 0 Unknown, 721 Unchecked, 0.6s Time] [2022-01-18 16:23:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-01-18 16:23:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 735. [2022-01-18 16:23:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.016348773841962) internal successors, (1480), 734 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1480 transitions. [2022-01-18 16:23:36,123 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1480 transitions. Word has length 33 [2022-01-18 16:23:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:36,124 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1480 transitions. [2022-01-18 16:23:36,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1480 transitions. [2022-01-18 16:23:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:36,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:36,124 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:36,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:36,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:36,328 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1124068932, now seen corresponding path program 136 times [2022-01-18 16:23:36,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428915157] [2022-01-18 16:23:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:36,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:36,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428915157] [2022-01-18 16:23:36,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428915157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154253596] [2022-01-18 16:23:36,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:36,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:36,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:36,611 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:36,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 16:23:36,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:36,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:37,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:37,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:37,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:37,634 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:37,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:37,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154253596] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:37,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:37,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:37,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186992910] [2022-01-18 16:23:37,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:37,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:37,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:37,699 INFO L87 Difference]: Start difference. First operand 735 states and 1480 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:39,045 INFO L93 Difference]: Finished difference Result 1011 states and 2010 transitions. [2022-01-18 16:23:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:23:39,045 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:39,046 INFO L225 Difference]: With dead ends: 1011 [2022-01-18 16:23:39,047 INFO L226 Difference]: Without dead ends: 975 [2022-01-18 16:23:39,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=422, Invalid=4690, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:23:39,047 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:39,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 551 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1481 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-01-18 16:23:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-01-18 16:23:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 746. [2022-01-18 16:23:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.0134228187919465) internal successors, (1500), 745 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1500 transitions. [2022-01-18 16:23:39,054 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1500 transitions. Word has length 33 [2022-01-18 16:23:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:39,054 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1500 transitions. [2022-01-18 16:23:39,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1500 transitions. [2022-01-18 16:23:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:39,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:39,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:39,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:39,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:39,270 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:39,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:39,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1900454904, now seen corresponding path program 137 times [2022-01-18 16:23:39,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:39,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648924140] [2022-01-18 16:23:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:39,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:39,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648924140] [2022-01-18 16:23:39,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648924140] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:39,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681810063] [2022-01-18 16:23:39,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:39,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:39,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:39,548 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:39,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 16:23:39,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:23:39,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:40,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:40,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:40,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:40,557 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:40,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:23:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:40,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681810063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:40,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:40,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:23:40,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978397787] [2022-01-18 16:23:40,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:40,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:23:40,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:40,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:23:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:23:40,591 INFO L87 Difference]: Start difference. First operand 746 states and 1500 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:23:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:41,742 INFO L93 Difference]: Finished difference Result 1092 states and 2189 transitions. [2022-01-18 16:23:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:23:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:41,743 INFO L225 Difference]: With dead ends: 1092 [2022-01-18 16:23:41,743 INFO L226 Difference]: Without dead ends: 1043 [2022-01-18 16:23:41,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=495, Invalid=5667, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:23:41,743 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:41,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 524 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1631 Invalid, 0 Unknown, 359 Unchecked, 0.4s Time] [2022-01-18 16:23:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-18 16:23:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 737. [2022-01-18 16:23:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-01-18 16:23:41,750 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-01-18 16:23:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:41,750 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-01-18 16:23:41,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:23:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-01-18 16:23:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:41,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:41,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:41,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:41,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:41,959 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:41,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:41,959 INFO L85 PathProgramCache]: Analyzing trace with hash 261553658, now seen corresponding path program 138 times [2022-01-18 16:23:41,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:41,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967880209] [2022-01-18 16:23:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:41,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:42,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967880209] [2022-01-18 16:23:42,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967880209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:42,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524299492] [2022-01-18 16:23:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:23:42,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:42,184 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:42,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 16:23:42,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:23:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:42,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:42,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:42,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:42,916 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:42,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:42,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524299492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:42,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:42,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:42,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231189147] [2022-01-18 16:23:42,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:42,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:42,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:42,956 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:44,166 INFO L93 Difference]: Finished difference Result 1001 states and 1990 transitions. [2022-01-18 16:23:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:23:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:44,168 INFO L225 Difference]: With dead ends: 1001 [2022-01-18 16:23:44,168 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 16:23:44,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=490, Invalid=5210, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:23:44,168 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:44,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 380 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 994 Invalid, 0 Unknown, 670 Unchecked, 0.3s Time] [2022-01-18 16:23:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 16:23:44,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 752. [2022-01-18 16:23:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.0119840213049267) internal successors, (1511), 751 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1511 transitions. [2022-01-18 16:23:44,175 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1511 transitions. Word has length 33 [2022-01-18 16:23:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:44,175 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1511 transitions. [2022-01-18 16:23:44,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1511 transitions. [2022-01-18 16:23:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:44,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:44,176 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:44,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 16:23:44,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-01-18 16:23:44,387 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash -7589228, now seen corresponding path program 139 times [2022-01-18 16:23:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880098896] [2022-01-18 16:23:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:44,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:44,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880098896] [2022-01-18 16:23:44,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880098896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582194531] [2022-01-18 16:23:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:23:44,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:44,674 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:44,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 16:23:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:45,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:45,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:45,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:45,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:45,673 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:45,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:45,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582194531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:45,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:45,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:45,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382502081] [2022-01-18 16:23:45,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:45,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:45,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:45,716 INFO L87 Difference]: Start difference. First operand 752 states and 1511 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:47,303 INFO L93 Difference]: Finished difference Result 1049 states and 2068 transitions. [2022-01-18 16:23:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:23:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:47,304 INFO L225 Difference]: With dead ends: 1049 [2022-01-18 16:23:47,304 INFO L226 Difference]: Without dead ends: 972 [2022-01-18 16:23:47,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=523, Invalid=5797, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:23:47,305 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 170 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:47,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 493 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1404 Invalid, 0 Unknown, 200 Unchecked, 0.5s Time] [2022-01-18 16:23:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-01-18 16:23:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2022-01-18 16:23:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.016238159675237) internal successors, (1490), 739 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1490 transitions. [2022-01-18 16:23:47,311 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1490 transitions. Word has length 33 [2022-01-18 16:23:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:47,311 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1490 transitions. [2022-01-18 16:23:47,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1490 transitions. [2022-01-18 16:23:47,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:47,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:47,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:47,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:47,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-01-18 16:23:47,519 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:47,519 INFO L85 PathProgramCache]: Analyzing trace with hash -379556932, now seen corresponding path program 140 times [2022-01-18 16:23:47,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:47,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250310320] [2022-01-18 16:23:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:47,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:47,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:47,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250310320] [2022-01-18 16:23:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250310320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:47,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815621497] [2022-01-18 16:23:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:23:47,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:47,717 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:47,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 16:23:47,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:23:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:48,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:48,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:48,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:48,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:48,664 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:48,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:48,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815621497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:48,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:48,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:48,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101095016] [2022-01-18 16:23:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:48,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:48,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:48,723 INFO L87 Difference]: Start difference. First operand 740 states and 1490 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:50,620 INFO L93 Difference]: Finished difference Result 1168 states and 2313 transitions. [2022-01-18 16:23:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 16:23:50,620 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:50,621 INFO L225 Difference]: With dead ends: 1168 [2022-01-18 16:23:50,621 INFO L226 Difference]: Without dead ends: 1136 [2022-01-18 16:23:50,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=756, Invalid=7076, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:23:50,622 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:50,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 459 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1263 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-01-18 16:23:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-01-18 16:23:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 737. [2022-01-18 16:23:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-01-18 16:23:50,629 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-01-18 16:23:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:50,629 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-01-18 16:23:50,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-01-18 16:23:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:50,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:50,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:50,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:50,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 16:23:50,831 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1046685434, now seen corresponding path program 141 times [2022-01-18 16:23:50,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091159243] [2022-01-18 16:23:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:50,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:51,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091159243] [2022-01-18 16:23:51,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091159243] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467025297] [2022-01-18 16:23:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:23:51,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:51,042 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 16:23:51,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:23:51,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:51,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:51,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:51,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:51,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:51,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:51,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:51,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467025297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:51,798 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:51,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:51,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864256276] [2022-01-18 16:23:51,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:51,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:51,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:51,799 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:53,715 INFO L93 Difference]: Finished difference Result 1265 states and 2518 transitions. [2022-01-18 16:23:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:23:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:53,716 INFO L225 Difference]: With dead ends: 1265 [2022-01-18 16:23:53,716 INFO L226 Difference]: Without dead ends: 1237 [2022-01-18 16:23:53,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1006, Invalid=8306, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:23:53,717 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:53,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 439 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1433 Invalid, 0 Unknown, 415 Unchecked, 0.4s Time] [2022-01-18 16:23:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-01-18 16:23:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 736. [2022-01-18 16:23:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.016326530612245) internal successors, (1482), 735 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1482 transitions. [2022-01-18 16:23:53,725 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1482 transitions. Word has length 33 [2022-01-18 16:23:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:53,725 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1482 transitions. [2022-01-18 16:23:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1482 transitions. [2022-01-18 16:23:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:53,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:53,725 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:53,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:53,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:53,941 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:53,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash -548232470, now seen corresponding path program 142 times [2022-01-18 16:23:53,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:53,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574798878] [2022-01-18 16:23:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:53,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:54,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574798878] [2022-01-18 16:23:54,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574798878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049910954] [2022-01-18 16:23:54,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:23:54,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:54,146 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:54,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 16:23:54,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:23:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:54,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:54,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:23:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:54,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:55,122 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:55,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:23:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049910954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:55,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:55,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:23:55,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155284397] [2022-01-18 16:23:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:55,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:23:55,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:55,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:23:55,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:23:55,169 INFO L87 Difference]: Start difference. First operand 736 states and 1482 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:56,677 INFO L93 Difference]: Finished difference Result 1163 states and 2303 transitions. [2022-01-18 16:23:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:23:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:56,678 INFO L225 Difference]: With dead ends: 1163 [2022-01-18 16:23:56,679 INFO L226 Difference]: Without dead ends: 1091 [2022-01-18 16:23:56,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=516, Invalid=5490, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 16:23:56,679 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:56,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 478 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1223 Invalid, 0 Unknown, 584 Unchecked, 0.5s Time] [2022-01-18 16:23:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-01-18 16:23:56,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 756. [2022-01-18 16:23:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.0119205298013245) internal successors, (1519), 755 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1519 transitions. [2022-01-18 16:23:56,686 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1519 transitions. Word has length 33 [2022-01-18 16:23:56,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:56,686 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1519 transitions. [2022-01-18 16:23:56,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:56,686 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1519 transitions. [2022-01-18 16:23:56,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:56,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:56,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:56,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 16:23:56,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 16:23:56,892 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:56,892 INFO L85 PathProgramCache]: Analyzing trace with hash -817375356, now seen corresponding path program 143 times [2022-01-18 16:23:56,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:56,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720288173] [2022-01-18 16:23:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:56,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:23:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:57,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:23:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720288173] [2022-01-18 16:23:57,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720288173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:23:57,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600431753] [2022-01-18 16:23:57,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:23:57,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:23:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:23:57,189 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:23:57,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 16:23:57,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:23:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:23:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:23:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:23:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:23:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:23:57,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:23:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:57,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:23:58,365 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:23:58,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:23:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:23:58,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600431753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:23:58,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:23:58,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:23:58,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243285508] [2022-01-18 16:23:58,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:23:58,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:23:58,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:23:58,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:23:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:23:58,427 INFO L87 Difference]: Start difference. First operand 756 states and 1519 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:23:59,734 INFO L93 Difference]: Finished difference Result 1039 states and 2065 transitions. [2022-01-18 16:23:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:23:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:23:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:23:59,735 INFO L225 Difference]: With dead ends: 1039 [2022-01-18 16:23:59,735 INFO L226 Difference]: Without dead ends: 1021 [2022-01-18 16:23:59,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:23:59,736 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:23:59,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 440 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1396 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2022-01-18 16:23:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-01-18 16:23:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 756. [2022-01-18 16:23:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.009271523178808) internal successors, (1517), 755 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1517 transitions. [2022-01-18 16:23:59,742 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1517 transitions. Word has length 33 [2022-01-18 16:23:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:23:59,742 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1517 transitions. [2022-01-18 16:23:59,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:23:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1517 transitions. [2022-01-18 16:23:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:23:59,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:23:59,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:23:59,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 16:23:59,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-01-18 16:23:59,955 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:23:59,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:23:59,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337224, now seen corresponding path program 144 times [2022-01-18 16:23:59,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:23:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535961672] [2022-01-18 16:23:59,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:23:59,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:23:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:00,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:00,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535961672] [2022-01-18 16:24:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535961672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:00,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070284160] [2022-01-18 16:24:00,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:00,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:00,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:00,149 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:00,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 16:24:00,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:24:00,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:00,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-18 16:24:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:00,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:00,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:00,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:00,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:24:00,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:00,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:01,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:01,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:01,058 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:24:01,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:24:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:01,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070284160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:01,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:01,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:24:01,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412149953] [2022-01-18 16:24:01,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:01,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:24:01,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:24:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:24:01,145 INFO L87 Difference]: Start difference. First operand 756 states and 1517 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:06,778 INFO L93 Difference]: Finished difference Result 1602 states and 3115 transitions. [2022-01-18 16:24:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-18 16:24:06,778 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:06,779 INFO L225 Difference]: With dead ends: 1602 [2022-01-18 16:24:06,779 INFO L226 Difference]: Without dead ends: 1445 [2022-01-18 16:24:06,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1958, Invalid=18064, Unknown=0, NotChecked=0, Total=20022 [2022-01-18 16:24:06,781 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 390 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:06,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 732 Invalid, 3846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2807 Invalid, 0 Unknown, 831 Unchecked, 1.2s Time] [2022-01-18 16:24:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-01-18 16:24:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 821. [2022-01-18 16:24:06,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 16:24:06,790 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 16:24:06,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:06,790 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 16:24:06,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:06,790 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 16:24:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:06,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:06,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:06,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:07,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:07,006 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:07,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1189343060, now seen corresponding path program 145 times [2022-01-18 16:24:07,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:07,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112669700] [2022-01-18 16:24:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:07,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:07,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112669700] [2022-01-18 16:24:07,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112669700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501071891] [2022-01-18 16:24:07,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:07,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:07,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:07,300 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:07,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 16:24:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:07,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:07,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:08,301 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:08,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:08,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501071891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:08,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:08,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:08,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946536630] [2022-01-18 16:24:08,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:08,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:08,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:08,365 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:10,052 INFO L93 Difference]: Finished difference Result 1211 states and 2412 transitions. [2022-01-18 16:24:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:24:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:10,054 INFO L225 Difference]: With dead ends: 1211 [2022-01-18 16:24:10,054 INFO L226 Difference]: Without dead ends: 1179 [2022-01-18 16:24:10,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=659, Invalid=5983, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 16:24:10,054 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:10,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 411 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1367 Invalid, 0 Unknown, 262 Unchecked, 0.5s Time] [2022-01-18 16:24:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-01-18 16:24:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 821. [2022-01-18 16:24:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 16:24:10,063 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 16:24:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:10,063 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 16:24:10,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 16:24:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:10,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:10,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:10,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:10,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-01-18 16:24:10,276 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:10,276 INFO L85 PathProgramCache]: Analyzing trace with hash 236899306, now seen corresponding path program 146 times [2022-01-18 16:24:10,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:10,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41886154] [2022-01-18 16:24:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:10,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:10,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41886154] [2022-01-18 16:24:10,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41886154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986672277] [2022-01-18 16:24:10,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:10,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:10,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:10,561 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:10,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 16:24:10,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:10,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:10,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:10,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:10,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:10,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:11,239 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:11,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:11,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986672277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:11,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:11,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:11,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448333045] [2022-01-18 16:24:11,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:11,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:11,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:11,273 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:13,196 INFO L93 Difference]: Finished difference Result 1384 states and 2754 transitions. [2022-01-18 16:24:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:24:13,196 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:13,198 INFO L225 Difference]: With dead ends: 1384 [2022-01-18 16:24:13,198 INFO L226 Difference]: Without dead ends: 1356 [2022-01-18 16:24:13,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=976, Invalid=8336, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:24:13,198 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 555 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1698 Invalid, 0 Unknown, 592 Unchecked, 0.5s Time] [2022-01-18 16:24:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-01-18 16:24:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 821. [2022-01-18 16:24:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-01-18 16:24:13,207 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-01-18 16:24:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-01-18 16:24:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-01-18 16:24:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:13,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:13,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:13,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:13,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:13,423 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash 614999010, now seen corresponding path program 147 times [2022-01-18 16:24:13,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:13,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787653377] [2022-01-18 16:24:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:13,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:13,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:13,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787653377] [2022-01-18 16:24:13,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787653377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:13,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132029250] [2022-01-18 16:24:13,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:13,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:13,709 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:13,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 16:24:13,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:24:13,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:13,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:24:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:14,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:14,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:24:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:14,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:14,556 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:14,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:14,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132029250] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:14,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:14,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:14,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89356030] [2022-01-18 16:24:14,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:14,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:14,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:14,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:14,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:14,606 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:15,919 INFO L93 Difference]: Finished difference Result 1152 states and 2297 transitions. [2022-01-18 16:24:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:24:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:15,920 INFO L225 Difference]: With dead ends: 1152 [2022-01-18 16:24:15,920 INFO L226 Difference]: Without dead ends: 1110 [2022-01-18 16:24:15,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=4946, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:24:15,921 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:15,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 513 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1262 Invalid, 0 Unknown, 482 Unchecked, 0.5s Time] [2022-01-18 16:24:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-01-18 16:24:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 802. [2022-01-18 16:24:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 2.0187265917602994) internal successors, (1617), 801 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:15,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1617 transitions. [2022-01-18 16:24:15,928 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1617 transitions. Word has length 33 [2022-01-18 16:24:15,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:15,928 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1617 transitions. [2022-01-18 16:24:15,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1617 transitions. [2022-01-18 16:24:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:15,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:15,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:15,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:16,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:16,144 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:16,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:16,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1965596322, now seen corresponding path program 148 times [2022-01-18 16:24:16,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:16,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635353854] [2022-01-18 16:24:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:16,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:16,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:16,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635353854] [2022-01-18 16:24:16,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635353854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:16,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272570831] [2022-01-18 16:24:16,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:16,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:16,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:16,410 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:16,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 16:24:16,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:16,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:16,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:16,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:16,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:16,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:16,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:17,409 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:17,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:17,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272570831] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:17,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:17,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:17,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754445022] [2022-01-18 16:24:17,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:17,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:17,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:17,474 INFO L87 Difference]: Start difference. First operand 802 states and 1617 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:18,792 INFO L93 Difference]: Finished difference Result 1320 states and 2641 transitions. [2022-01-18 16:24:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:24:18,793 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:18,794 INFO L225 Difference]: With dead ends: 1320 [2022-01-18 16:24:18,794 INFO L226 Difference]: Without dead ends: 1288 [2022-01-18 16:24:18,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=494, Invalid=4908, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:24:18,794 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:18,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 404 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1420 Invalid, 0 Unknown, 275 Unchecked, 0.5s Time] [2022-01-18 16:24:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-01-18 16:24:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 803. [2022-01-18 16:24:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.018703241895262) internal successors, (1619), 802 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1619 transitions. [2022-01-18 16:24:18,802 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1619 transitions. Word has length 33 [2022-01-18 16:24:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1619 transitions. [2022-01-18 16:24:18,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1619 transitions. [2022-01-18 16:24:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:18,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:18,803 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:18,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:19,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:19,004 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:19,004 INFO L85 PathProgramCache]: Analyzing trace with hash -903128608, now seen corresponding path program 149 times [2022-01-18 16:24:19,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:19,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633429052] [2022-01-18 16:24:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:19,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:19,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633429052] [2022-01-18 16:24:19,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633429052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:19,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093977671] [2022-01-18 16:24:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:19,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:19,267 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:19,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 16:24:19,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:24:19,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:19,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:24:19,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:19,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:19,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:20,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:20,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:20,564 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:24:20,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:24:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:20,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093977671] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:20,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:20,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:24:20,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211194094] [2022-01-18 16:24:20,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:20,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:24:20,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:20,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:24:20,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:24:20,684 INFO L87 Difference]: Start difference. First operand 803 states and 1619 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:25,984 INFO L93 Difference]: Finished difference Result 1721 states and 3359 transitions. [2022-01-18 16:24:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-18 16:24:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:25,986 INFO L225 Difference]: With dead ends: 1721 [2022-01-18 16:24:25,986 INFO L226 Difference]: Without dead ends: 1597 [2022-01-18 16:24:25,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8048 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2641, Invalid=23119, Unknown=0, NotChecked=0, Total=25760 [2022-01-18 16:24:25,987 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 474 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:25,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 812 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 3554 Invalid, 0 Unknown, 225 Unchecked, 1.2s Time] [2022-01-18 16:24:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-01-18 16:24:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 842. [2022-01-18 16:24:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 16:24:25,997 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 16:24:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:25,997 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 16:24:25,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 16:24:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:25,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:25,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:26,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:26,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:26,213 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash 132052688, now seen corresponding path program 150 times [2022-01-18 16:24:26,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:26,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989862950] [2022-01-18 16:24:26,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:26,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:26,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989862950] [2022-01-18 16:24:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989862950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:26,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239678443] [2022-01-18 16:24:26,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:26,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:26,410 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 16:24:26,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:24:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:26,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:24:26,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:26,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:26,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:24:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:26,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:27,182 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:27,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239678443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:27,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:27,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:27,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968957585] [2022-01-18 16:24:27,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:27,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:27,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:27,217 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:28,265 INFO L93 Difference]: Finished difference Result 1155 states and 2310 transitions. [2022-01-18 16:24:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:24:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:28,266 INFO L225 Difference]: With dead ends: 1155 [2022-01-18 16:24:28,266 INFO L226 Difference]: Without dead ends: 1127 [2022-01-18 16:24:28,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:24:28,267 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:28,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 436 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1502 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-01-18 16:24:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-01-18 16:24:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 841. [2022-01-18 16:24:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.0238095238095237) internal successors, (1700), 840 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1700 transitions. [2022-01-18 16:24:28,275 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1700 transitions. Word has length 33 [2022-01-18 16:24:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:28,275 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1700 transitions. [2022-01-18 16:24:28,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1700 transitions. [2022-01-18 16:24:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:28,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:28,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:28,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:28,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:28,492 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:28,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1686290802, now seen corresponding path program 151 times [2022-01-18 16:24:28,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:28,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410974940] [2022-01-18 16:24:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:28,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:28,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:28,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410974940] [2022-01-18 16:24:28,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410974940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:28,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935434223] [2022-01-18 16:24:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:28,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:28,762 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:28,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 16:24:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:29,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:29,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:29,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:29,776 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:29,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:29,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935434223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:29,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:29,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:29,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620797276] [2022-01-18 16:24:29,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:29,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:29,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:29,837 INFO L87 Difference]: Start difference. First operand 841 states and 1700 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:31,592 INFO L93 Difference]: Finished difference Result 1266 states and 2512 transitions. [2022-01-18 16:24:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:24:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:31,594 INFO L225 Difference]: With dead ends: 1266 [2022-01-18 16:24:31,594 INFO L226 Difference]: Without dead ends: 1202 [2022-01-18 16:24:31,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=554, Invalid=5926, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:24:31,594 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 186 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:31,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 566 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1626 Invalid, 0 Unknown, 335 Unchecked, 0.6s Time] [2022-01-18 16:24:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-01-18 16:24:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 863. [2022-01-18 16:24:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.01508120649652) internal successors, (1737), 862 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1737 transitions. [2022-01-18 16:24:31,602 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1737 transitions. Word has length 33 [2022-01-18 16:24:31,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:31,602 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1737 transitions. [2022-01-18 16:24:31,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1737 transitions. [2022-01-18 16:24:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:31,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:31,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:31,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:31,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 16:24:31,803 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:31,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1816738172, now seen corresponding path program 152 times [2022-01-18 16:24:31,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:31,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637715595] [2022-01-18 16:24:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:31,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:32,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637715595] [2022-01-18 16:24:32,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637715595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:32,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837525607] [2022-01-18 16:24:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:32,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:32,086 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:32,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 16:24:32,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:32,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:32,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:32,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:33,130 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:33,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:33,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837525607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:33,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:33,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:33,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722231814] [2022-01-18 16:24:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:33,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:33,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:33,195 INFO L87 Difference]: Start difference. First operand 863 states and 1737 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:34,235 INFO L93 Difference]: Finished difference Result 1119 states and 2223 transitions. [2022-01-18 16:24:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:24:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:34,236 INFO L225 Difference]: With dead ends: 1119 [2022-01-18 16:24:34,236 INFO L226 Difference]: Without dead ends: 1070 [2022-01-18 16:24:34,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=449, Invalid=4807, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:24:34,237 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:34,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 547 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1382 Invalid, 0 Unknown, 247 Unchecked, 0.4s Time] [2022-01-18 16:24:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-01-18 16:24:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 850. [2022-01-18 16:24:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.0200235571260308) internal successors, (1715), 849 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1715 transitions. [2022-01-18 16:24:34,244 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1715 transitions. Word has length 33 [2022-01-18 16:24:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1715 transitions. [2022-01-18 16:24:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1715 transitions. [2022-01-18 16:24:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:34,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:34,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:34,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:34,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 16:24:34,458 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1979273514, now seen corresponding path program 153 times [2022-01-18 16:24:34,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:34,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362716390] [2022-01-18 16:24:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:34,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:34,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362716390] [2022-01-18 16:24:34,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362716390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823276727] [2022-01-18 16:24:34,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:34,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:34,666 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:34,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 16:24:34,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:24:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:34,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:35,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:35,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:35,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:35,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:35,574 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:35,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:35,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823276727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:35,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:35,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:35,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638655302] [2022-01-18 16:24:35,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:35,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:35,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:35,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:35,635 INFO L87 Difference]: Start difference. First operand 850 states and 1715 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:36,994 INFO L93 Difference]: Finished difference Result 1134 states and 2262 transitions. [2022-01-18 16:24:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:24:36,995 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:36,996 INFO L225 Difference]: With dead ends: 1134 [2022-01-18 16:24:36,996 INFO L226 Difference]: Without dead ends: 1113 [2022-01-18 16:24:36,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=486, Invalid=5064, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:24:36,996 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 121 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:36,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 300 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1109 Invalid, 0 Unknown, 213 Unchecked, 0.4s Time] [2022-01-18 16:24:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-01-18 16:24:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 842. [2022-01-18 16:24:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 16:24:37,009 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 16:24:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:37,009 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 16:24:37,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 16:24:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:37,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:37,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:37,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 16:24:37,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 16:24:37,225 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:37,226 INFO L85 PathProgramCache]: Analyzing trace with hash -300668212, now seen corresponding path program 154 times [2022-01-18 16:24:37,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:37,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190824616] [2022-01-18 16:24:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:37,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:37,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190824616] [2022-01-18 16:24:37,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190824616] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757860633] [2022-01-18 16:24:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:37,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:37,431 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:37,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 16:24:37,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:37,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:37,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:37,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:37,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:37,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:37,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:38,134 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:38,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:38,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757860633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:38,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:38,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:38,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34730431] [2022-01-18 16:24:38,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:38,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:38,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:38,169 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:39,740 INFO L93 Difference]: Finished difference Result 1142 states and 2281 transitions. [2022-01-18 16:24:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:24:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:39,742 INFO L225 Difference]: With dead ends: 1142 [2022-01-18 16:24:39,742 INFO L226 Difference]: Without dead ends: 1098 [2022-01-18 16:24:39,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=539, Invalid=5623, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 16:24:39,742 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:39,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 515 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1701 Invalid, 0 Unknown, 391 Unchecked, 0.6s Time] [2022-01-18 16:24:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-01-18 16:24:39,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 843. [2022-01-18 16:24:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.02375296912114) internal successors, (1704), 842 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1704 transitions. [2022-01-18 16:24:39,760 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1704 transitions. Word has length 33 [2022-01-18 16:24:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1704 transitions. [2022-01-18 16:24:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1704 transitions. [2022-01-18 16:24:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:39,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:39,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:39,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:39,979 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -941778802, now seen corresponding path program 155 times [2022-01-18 16:24:39,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597218192] [2022-01-18 16:24:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:39,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:39,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:40,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597218192] [2022-01-18 16:24:40,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597218192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827423195] [2022-01-18 16:24:40,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:24:40,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:40,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:40,245 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:40,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 16:24:40,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:24:40,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:40,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:24:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:40,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:40,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:41,363 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:41,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:24:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:41,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827423195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:41,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:41,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:24:41,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991218622] [2022-01-18 16:24:41,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:41,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:24:41,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:41,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:24:41,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:24:41,420 INFO L87 Difference]: Start difference. First operand 843 states and 1704 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:24:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:43,844 INFO L93 Difference]: Finished difference Result 1518 states and 3033 transitions. [2022-01-18 16:24:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:24:43,844 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:43,846 INFO L225 Difference]: With dead ends: 1518 [2022-01-18 16:24:43,846 INFO L226 Difference]: Without dead ends: 1486 [2022-01-18 16:24:43,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=980, Invalid=9732, Unknown=0, NotChecked=0, Total=10712 [2022-01-18 16:24:43,847 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:43,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 579 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1997 Invalid, 0 Unknown, 356 Unchecked, 0.7s Time] [2022-01-18 16:24:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-01-18 16:24:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 842. [2022-01-18 16:24:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-01-18 16:24:43,855 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-01-18 16:24:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:43,855 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-01-18 16:24:43,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:24:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-01-18 16:24:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:43,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:43,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:43,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:44,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:44,071 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:44,072 INFO L85 PathProgramCache]: Analyzing trace with hash 484463564, now seen corresponding path program 156 times [2022-01-18 16:24:44,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:44,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911158810] [2022-01-18 16:24:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:44,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:44,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911158810] [2022-01-18 16:24:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911158810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444842803] [2022-01-18 16:24:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:24:44,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:44,309 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:44,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 16:24:44,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:24:44,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:24:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:44,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:24:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:44,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:45,045 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:45,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:45,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444842803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:45,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:45,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:45,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751332100] [2022-01-18 16:24:45,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:45,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:45,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:45,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:45,113 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:47,993 INFO L93 Difference]: Finished difference Result 1471 states and 2936 transitions. [2022-01-18 16:24:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:24:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:47,995 INFO L225 Difference]: With dead ends: 1471 [2022-01-18 16:24:47,995 INFO L226 Difference]: Without dead ends: 1428 [2022-01-18 16:24:47,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1268, Invalid=10288, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 16:24:47,995 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 260 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:47,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 506 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1878 Invalid, 0 Unknown, 534 Unchecked, 0.7s Time] [2022-01-18 16:24:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-01-18 16:24:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 847. [2022-01-18 16:24:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.023640661938534) internal successors, (1712), 846 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1712 transitions. [2022-01-18 16:24:48,006 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1712 transitions. Word has length 33 [2022-01-18 16:24:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:48,006 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1712 transitions. [2022-01-18 16:24:48,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1712 transitions. [2022-01-18 16:24:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:48,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:48,007 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:48,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:48,222 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:48,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:48,222 INFO L85 PathProgramCache]: Analyzing trace with hash -430169182, now seen corresponding path program 157 times [2022-01-18 16:24:48,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:48,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852787295] [2022-01-18 16:24:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:48,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:48,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852787295] [2022-01-18 16:24:48,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852787295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:48,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475775563] [2022-01-18 16:24:48,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:24:48,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:48,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:48,491 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:48,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 16:24:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:48,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:48,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:48,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:49,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:49,507 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:49,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475775563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:49,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:49,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:49,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897765389] [2022-01-18 16:24:49,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:49,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:49,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:49,558 INFO L87 Difference]: Start difference. First operand 847 states and 1712 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:51,784 INFO L93 Difference]: Finished difference Result 1328 states and 2640 transitions. [2022-01-18 16:24:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:24:51,784 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:51,785 INFO L225 Difference]: With dead ends: 1328 [2022-01-18 16:24:51,786 INFO L226 Difference]: Without dead ends: 1251 [2022-01-18 16:24:51,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=926, Invalid=8776, Unknown=0, NotChecked=0, Total=9702 [2022-01-18 16:24:51,786 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:51,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 526 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2357 Invalid, 0 Unknown, 108 Unchecked, 0.8s Time] [2022-01-18 16:24:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-01-18 16:24:51,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 861. [2022-01-18 16:24:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.0232558139534884) internal successors, (1740), 860 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1740 transitions. [2022-01-18 16:24:51,795 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1740 transitions. Word has length 33 [2022-01-18 16:24:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:51,795 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1740 transitions. [2022-01-18 16:24:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1740 transitions. [2022-01-18 16:24:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:51,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:51,796 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:51,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:52,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:52,009 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:52,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2013605696, now seen corresponding path program 158 times [2022-01-18 16:24:52,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296676148] [2022-01-18 16:24:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:52,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:52,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296676148] [2022-01-18 16:24:52,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296676148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:52,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833370702] [2022-01-18 16:24:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:24:52,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:52,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:52,287 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 16:24:52,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:24:52,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:52,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:52,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:52,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:52,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:52,984 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:52,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:53,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833370702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:53,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691984218] [2022-01-18 16:24:53,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:53,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:53,018 INFO L87 Difference]: Start difference. First operand 861 states and 1740 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:54,511 INFO L93 Difference]: Finished difference Result 1304 states and 2583 transitions. [2022-01-18 16:24:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:24:54,512 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:54,513 INFO L225 Difference]: With dead ends: 1304 [2022-01-18 16:24:54,513 INFO L226 Difference]: Without dead ends: 1274 [2022-01-18 16:24:54,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=634, Invalid=7556, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:24:54,514 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 187 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:54,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 480 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1594 Invalid, 0 Unknown, 467 Unchecked, 0.5s Time] [2022-01-18 16:24:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-01-18 16:24:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 934. [2022-01-18 16:24:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.0182207931404075) internal successors, (1883), 933 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1883 transitions. [2022-01-18 16:24:54,523 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1883 transitions. Word has length 33 [2022-01-18 16:24:54,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:54,523 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1883 transitions. [2022-01-18 16:24:54,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:54,523 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1883 transitions. [2022-01-18 16:24:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:54,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:54,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:54,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:54,724 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1235832742, now seen corresponding path program 159 times [2022-01-18 16:24:54,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950669205] [2022-01-18 16:24:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:54,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:54,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950669205] [2022-01-18 16:24:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950669205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:54,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123274505] [2022-01-18 16:24:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:24:54,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:54,997 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:54,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 16:24:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:24:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:55,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:55,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:55,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:56,001 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:56,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123274505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:56,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:56,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:56,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139021436] [2022-01-18 16:24:56,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:56,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:56,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:56,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:56,063 INFO L87 Difference]: Start difference. First operand 934 states and 1883 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:24:58,085 INFO L93 Difference]: Finished difference Result 1308 states and 2605 transitions. [2022-01-18 16:24:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:24:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:24:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:24:58,086 INFO L225 Difference]: With dead ends: 1308 [2022-01-18 16:24:58,086 INFO L226 Difference]: Without dead ends: 1183 [2022-01-18 16:24:58,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=655, Invalid=7717, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:24:58,087 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 195 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:24:58,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 471 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1849 Invalid, 0 Unknown, 286 Unchecked, 0.7s Time] [2022-01-18 16:24:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-01-18 16:24:58,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 875. [2022-01-18 16:24:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.0274599542334095) internal successors, (1772), 874 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1772 transitions. [2022-01-18 16:24:58,094 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1772 transitions. Word has length 33 [2022-01-18 16:24:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:24:58,094 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1772 transitions. [2022-01-18 16:24:58,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:24:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1772 transitions. [2022-01-18 16:24:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:24:58,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:24:58,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:24:58,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-01-18 16:24:58,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:58,309 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:24:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:24:58,309 INFO L85 PathProgramCache]: Analyzing trace with hash -627983106, now seen corresponding path program 160 times [2022-01-18 16:24:58,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:24:58,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459545987] [2022-01-18 16:24:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:24:58,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:24:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:24:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:58,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:24:58,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459545987] [2022-01-18 16:24:58,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459545987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:24:58,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806759398] [2022-01-18 16:24:58,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:24:58,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:24:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:24:58,526 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:24:58,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 16:24:58,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:24:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:24:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:24:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:24:58,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:24:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:24:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:24:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:58,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:24:59,309 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:24:59,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:24:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:24:59,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806759398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:24:59,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:24:59,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:24:59,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173380887] [2022-01-18 16:24:59,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:24:59,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:24:59,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:24:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:24:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:24:59,359 INFO L87 Difference]: Start difference. First operand 875 states and 1772 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:01,610 INFO L93 Difference]: Finished difference Result 1382 states and 2756 transitions. [2022-01-18 16:25:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:25:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:01,611 INFO L225 Difference]: With dead ends: 1382 [2022-01-18 16:25:01,611 INFO L226 Difference]: Without dead ends: 1294 [2022-01-18 16:25:01,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 36 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=808, Invalid=9092, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:25:01,612 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:01,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 540 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2252 Invalid, 0 Unknown, 793 Unchecked, 0.7s Time] [2022-01-18 16:25:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-01-18 16:25:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 876. [2022-01-18 16:25:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.0274285714285716) internal successors, (1774), 875 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1774 transitions. [2022-01-18 16:25:01,620 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1774 transitions. Word has length 33 [2022-01-18 16:25:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:01,620 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1774 transitions. [2022-01-18 16:25:01,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:01,620 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1774 transitions. [2022-01-18 16:25:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:01,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:01,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:01,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:01,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-01-18 16:25:01,835 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:01,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1269093696, now seen corresponding path program 161 times [2022-01-18 16:25:01,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:01,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016700967] [2022-01-18 16:25:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:01,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:02,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016700967] [2022-01-18 16:25:02,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016700967] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:02,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290076085] [2022-01-18 16:25:02,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:02,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:02,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:02,192 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:02,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 16:25:02,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:25:02,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:02,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:02,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:02,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:03,316 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:03,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:25:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290076085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:03,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:03,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:25:03,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596469059] [2022-01-18 16:25:03,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:03,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:25:03,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:25:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:25:03,378 INFO L87 Difference]: Start difference. First operand 876 states and 1774 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:25:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:08,006 INFO L93 Difference]: Finished difference Result 1697 states and 3376 transitions. [2022-01-18 16:25:08,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-18 16:25:08,006 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:08,008 INFO L225 Difference]: With dead ends: 1697 [2022-01-18 16:25:08,008 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 16:25:08,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6161 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1618, Invalid=16742, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 16:25:08,010 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 312 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:08,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 609 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2970 Invalid, 0 Unknown, 352 Unchecked, 1.2s Time] [2022-01-18 16:25:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 16:25:08,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 887. [2022-01-18 16:25:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-01-18 16:25:08,019 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-01-18 16:25:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:08,019 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-01-18 16:25:08,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:25:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-01-18 16:25:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:08,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:08,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:08,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:08,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 16:25:08,235 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:08,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 157148670, now seen corresponding path program 162 times [2022-01-18 16:25:08,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109910817] [2022-01-18 16:25:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:08,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:08,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:08,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109910817] [2022-01-18 16:25:08,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109910817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:08,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609971300] [2022-01-18 16:25:08,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:08,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:08,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:08,474 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:08,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 16:25:08,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:25:08,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:08,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:08,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:25:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:08,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:09,224 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:09,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:09,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609971300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:09,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:09,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:09,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737106380] [2022-01-18 16:25:09,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:09,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:09,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:09,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:09,278 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:12,356 INFO L93 Difference]: Finished difference Result 1477 states and 2950 transitions. [2022-01-18 16:25:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:25:12,356 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:12,358 INFO L225 Difference]: With dead ends: 1477 [2022-01-18 16:25:12,358 INFO L226 Difference]: Without dead ends: 1449 [2022-01-18 16:25:12,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1231, Invalid=10111, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 16:25:12,358 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 222 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:12,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 408 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1516 Invalid, 0 Unknown, 387 Unchecked, 0.6s Time] [2022-01-18 16:25:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-01-18 16:25:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 887. [2022-01-18 16:25:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-01-18 16:25:12,367 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-01-18 16:25:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:12,367 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-01-18 16:25:12,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-01-18 16:25:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:12,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:12,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:12,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-01-18 16:25:12,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 16:25:12,586 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:12,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1437769234, now seen corresponding path program 163 times [2022-01-18 16:25:12,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:12,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033973396] [2022-01-18 16:25:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:12,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:12,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033973396] [2022-01-18 16:25:12,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033973396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:12,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60122883] [2022-01-18 16:25:12,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:12,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:12,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:12,779 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:12,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 16:25:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:12,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:13,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:13,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:13,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:13,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:13,523 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:13,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60122883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:13,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:13,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:13,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410397243] [2022-01-18 16:25:13,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:13,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:13,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:13,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:13,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:13,587 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:15,586 INFO L93 Difference]: Finished difference Result 1299 states and 2591 transitions. [2022-01-18 16:25:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:25:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:15,588 INFO L225 Difference]: With dead ends: 1299 [2022-01-18 16:25:15,588 INFO L226 Difference]: Without dead ends: 1221 [2022-01-18 16:25:15,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=734, Invalid=8386, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:25:15,589 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:15,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 397 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1418 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-01-18 16:25:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-01-18 16:25:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 903. [2022-01-18 16:25:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0277161862527717) internal successors, (1829), 902 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1829 transitions. [2022-01-18 16:25:15,613 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1829 transitions. Word has length 33 [2022-01-18 16:25:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1829 transitions. [2022-01-18 16:25:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1829 transitions. [2022-01-18 16:25:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:15,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:15,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:15,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:15,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 16:25:15,830 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1706912120, now seen corresponding path program 164 times [2022-01-18 16:25:15,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:15,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840404408] [2022-01-18 16:25:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:15,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:16,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840404408] [2022-01-18 16:25:16,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840404408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:16,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576591569] [2022-01-18 16:25:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:16,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:16,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:16,124 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:16,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 16:25:16,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:16,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:16,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:16,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:16,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:17,133 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:17,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:17,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576591569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:17,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:17,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:17,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201731228] [2022-01-18 16:25:17,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:17,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:17,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:17,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:17,185 INFO L87 Difference]: Start difference. First operand 903 states and 1829 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:19,667 INFO L93 Difference]: Finished difference Result 1326 states and 2635 transitions. [2022-01-18 16:25:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:25:19,667 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:19,669 INFO L225 Difference]: With dead ends: 1326 [2022-01-18 16:25:19,669 INFO L226 Difference]: Without dead ends: 1263 [2022-01-18 16:25:19,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=674, Invalid=7882, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:25:19,669 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:19,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 653 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2512 Invalid, 0 Unknown, 594 Unchecked, 0.9s Time] [2022-01-18 16:25:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-01-18 16:25:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 897. [2022-01-18 16:25:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.0301339285714284) internal successors, (1819), 896 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1819 transitions. [2022-01-18 16:25:19,678 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1819 transitions. Word has length 33 [2022-01-18 16:25:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1819 transitions. [2022-01-18 16:25:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1819 transitions. [2022-01-18 16:25:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:19,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:19,679 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:19,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-01-18 16:25:19,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 16:25:19,879 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:19,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:19,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1176800460, now seen corresponding path program 165 times [2022-01-18 16:25:19,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:19,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930109164] [2022-01-18 16:25:19,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:19,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:20,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:20,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:20,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930109164] [2022-01-18 16:25:20,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930109164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:20,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6312972] [2022-01-18 16:25:20,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:20,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:20,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:20,154 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:20,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 16:25:20,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:25:20,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:20,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:20,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:20,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:20,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:20,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:21,175 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:21,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:21,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6312972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:21,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:21,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:21,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302977191] [2022-01-18 16:25:21,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:21,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:21,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:21,231 INFO L87 Difference]: Start difference. First operand 897 states and 1819 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:23,385 INFO L93 Difference]: Finished difference Result 1298 states and 2587 transitions. [2022-01-18 16:25:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:25:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:23,387 INFO L225 Difference]: With dead ends: 1298 [2022-01-18 16:25:23,387 INFO L226 Difference]: Without dead ends: 1234 [2022-01-18 16:25:23,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=695, Invalid=7861, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:25:23,388 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:23,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1695 Invalid, 0 Unknown, 580 Unchecked, 0.7s Time] [2022-01-18 16:25:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-01-18 16:25:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 893. [2022-01-18 16:25:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.0280269058295963) internal successors, (1809), 892 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1809 transitions. [2022-01-18 16:25:23,396 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1809 transitions. Word has length 33 [2022-01-18 16:25:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:23,396 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1809 transitions. [2022-01-18 16:25:23,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1809 transitions. [2022-01-18 16:25:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:23,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:23,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:23,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:23,597 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2078879824, now seen corresponding path program 166 times [2022-01-18 16:25:23,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:23,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264962975] [2022-01-18 16:25:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:23,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:23,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:23,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264962975] [2022-01-18 16:25:23,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264962975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145467322] [2022-01-18 16:25:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:23,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:23,871 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:23,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 16:25:23,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:23,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:24,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:24,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:24,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:24,849 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:24,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:24,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145467322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:24,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:24,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:24,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607326171] [2022-01-18 16:25:24,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:24,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:24,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:24,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:24,906 INFO L87 Difference]: Start difference. First operand 893 states and 1809 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:28,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:28,300 INFO L93 Difference]: Finished difference Result 1570 states and 3126 transitions. [2022-01-18 16:25:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-18 16:25:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:28,301 INFO L225 Difference]: With dead ends: 1570 [2022-01-18 16:25:28,301 INFO L226 Difference]: Without dead ends: 1466 [2022-01-18 16:25:28,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4895 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1536, Invalid=13716, Unknown=0, NotChecked=0, Total=15252 [2022-01-18 16:25:28,302 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 282 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:28,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 375 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2057 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-01-18 16:25:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-01-18 16:25:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 898. [2022-01-18 16:25:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0267558528428093) internal successors, (1818), 897 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1818 transitions. [2022-01-18 16:25:28,311 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1818 transitions. Word has length 33 [2022-01-18 16:25:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:28,311 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1818 transitions. [2022-01-18 16:25:28,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1818 transitions. [2022-01-18 16:25:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:28,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:28,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:28,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:28,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:28,527 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1076059558, now seen corresponding path program 167 times [2022-01-18 16:25:28,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:28,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677253441] [2022-01-18 16:25:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:28,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:28,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:28,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677253441] [2022-01-18 16:25:28,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677253441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:28,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896546236] [2022-01-18 16:25:28,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:28,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:28,732 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:28,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 16:25:28,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:28,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:25:28,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:28,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:28,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:29,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:29,610 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:29,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:25:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896546236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:29,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:29,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:25:29,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002953764] [2022-01-18 16:25:29,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:29,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:25:29,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:25:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:25:29,660 INFO L87 Difference]: Start difference. First operand 898 states and 1818 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:25:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:33,667 INFO L93 Difference]: Finished difference Result 1643 states and 3255 transitions. [2022-01-18 16:25:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-18 16:25:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:33,669 INFO L225 Difference]: With dead ends: 1643 [2022-01-18 16:25:33,669 INFO L226 Difference]: Without dead ends: 1513 [2022-01-18 16:25:33,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5872 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1665, Invalid=16695, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 16:25:33,671 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 355 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:33,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 444 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2796 Invalid, 0 Unknown, 35 Unchecked, 1.0s Time] [2022-01-18 16:25:33,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2022-01-18 16:25:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 957. [2022-01-18 16:25:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.032426778242678) internal successors, (1943), 956 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1943 transitions. [2022-01-18 16:25:33,680 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1943 transitions. Word has length 33 [2022-01-18 16:25:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:33,680 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1943 transitions. [2022-01-18 16:25:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:25:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1943 transitions. [2022-01-18 16:25:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:33,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:33,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:33,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 16:25:33,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-01-18 16:25:33,896 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -757484076, now seen corresponding path program 168 times [2022-01-18 16:25:33,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71521037] [2022-01-18 16:25:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:33,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:34,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:34,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71521037] [2022-01-18 16:25:34,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71521037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:34,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837992182] [2022-01-18 16:25:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:34,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:34,163 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:34,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 16:25:34,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:25:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:34,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:34,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:25:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:34,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:35,112 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:35,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837992182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:35,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:35,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:35,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897596034] [2022-01-18 16:25:35,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:35,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:35,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:35,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:35,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:35,173 INFO L87 Difference]: Start difference. First operand 957 states and 1943 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:38,791 INFO L93 Difference]: Finished difference Result 1620 states and 3221 transitions. [2022-01-18 16:25:38,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-18 16:25:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:38,792 INFO L225 Difference]: With dead ends: 1620 [2022-01-18 16:25:38,792 INFO L226 Difference]: Without dead ends: 1503 [2022-01-18 16:25:38,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1406, Invalid=14344, Unknown=0, NotChecked=0, Total=15750 [2022-01-18 16:25:38,794 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 242 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 3361 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 3694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:38,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 643 Invalid, 3694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3361 Invalid, 0 Unknown, 180 Unchecked, 1.2s Time] [2022-01-18 16:25:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-01-18 16:25:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 982. [2022-01-18 16:25:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.0336391437308867) internal successors, (1995), 981 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1995 transitions. [2022-01-18 16:25:38,803 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1995 transitions. Word has length 33 [2022-01-18 16:25:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:38,803 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1995 transitions. [2022-01-18 16:25:38,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1995 transitions. [2022-01-18 16:25:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:38,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:38,804 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:38,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-01-18 16:25:39,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:39,007 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 469014850, now seen corresponding path program 169 times [2022-01-18 16:25:39,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197130679] [2022-01-18 16:25:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:39,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:39,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197130679] [2022-01-18 16:25:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197130679] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520622637] [2022-01-18 16:25:39,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:25:39,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:39,302 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:39,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 16:25:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:39,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:39,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:39,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:39,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:39,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:40,347 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:40,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:40,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520622637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:40,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:40,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:40,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746460843] [2022-01-18 16:25:40,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:40,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:40,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:40,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:40,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:40,439 INFO L87 Difference]: Start difference. First operand 982 states and 1995 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:43,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:43,542 INFO L93 Difference]: Finished difference Result 1688 states and 3361 transitions. [2022-01-18 16:25:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:25:43,543 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:43,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:43,544 INFO L225 Difference]: With dead ends: 1688 [2022-01-18 16:25:43,544 INFO L226 Difference]: Without dead ends: 1550 [2022-01-18 16:25:43,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1119, Invalid=11537, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:25:43,545 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 214 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:43,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 485 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2388 Invalid, 0 Unknown, 488 Unchecked, 0.9s Time] [2022-01-18 16:25:43,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-01-18 16:25:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1057. [2022-01-18 16:25:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.034090909090909) internal successors, (2148), 1056 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2148 transitions. [2022-01-18 16:25:43,554 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2148 transitions. Word has length 33 [2022-01-18 16:25:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 2148 transitions. [2022-01-18 16:25:43,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2148 transitions. [2022-01-18 16:25:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:43,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:43,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:43,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:43,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:43,771 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -21774050, now seen corresponding path program 170 times [2022-01-18 16:25:43,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:43,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051084926] [2022-01-18 16:25:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:43,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:43,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051084926] [2022-01-18 16:25:43,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051084926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125657137] [2022-01-18 16:25:43,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:25:43,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:43,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:43,960 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:43,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 16:25:43,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:25:43,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:43,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:44,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:44,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:44,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:44,865 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:44,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:44,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125657137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:44,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:44,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:44,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675575298] [2022-01-18 16:25:44,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:44,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:44,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:44,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:44,925 INFO L87 Difference]: Start difference. First operand 1057 states and 2148 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:49,643 INFO L93 Difference]: Finished difference Result 1804 states and 3584 transitions. [2022-01-18 16:25:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-18 16:25:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:49,645 INFO L225 Difference]: With dead ends: 1804 [2022-01-18 16:25:49,645 INFO L226 Difference]: Without dead ends: 1674 [2022-01-18 16:25:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1679, Invalid=17781, Unknown=0, NotChecked=0, Total=19460 [2022-01-18 16:25:49,646 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 372 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:49,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 833 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3362 Invalid, 0 Unknown, 446 Unchecked, 1.4s Time] [2022-01-18 16:25:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-01-18 16:25:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1152. [2022-01-18 16:25:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.0321459600347525) internal successors, (2339), 1151 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2339 transitions. [2022-01-18 16:25:49,657 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2339 transitions. Word has length 33 [2022-01-18 16:25:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 2339 transitions. [2022-01-18 16:25:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2339 transitions. [2022-01-18 16:25:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:49,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:49,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:49,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 16:25:49,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-01-18 16:25:49,873 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1284545878, now seen corresponding path program 171 times [2022-01-18 16:25:49,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:49,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377958389] [2022-01-18 16:25:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:49,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:50,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377958389] [2022-01-18 16:25:50,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377958389] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584683697] [2022-01-18 16:25:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:25:50,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:50,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:50,135 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:50,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 16:25:50,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:25:50,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:50,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:50,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:50,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:50,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:51,145 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:51,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:51,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584683697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:51,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:51,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:51,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411771726] [2022-01-18 16:25:51,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:51,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:51,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:51,193 INFO L87 Difference]: Start difference. First operand 1152 states and 2339 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:53,179 INFO L93 Difference]: Finished difference Result 1609 states and 3210 transitions. [2022-01-18 16:25:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:25:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:53,181 INFO L225 Difference]: With dead ends: 1609 [2022-01-18 16:25:53,181 INFO L226 Difference]: Without dead ends: 1580 [2022-01-18 16:25:53,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=750, Invalid=7806, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:25:53,182 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:53,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 555 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1570 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2022-01-18 16:25:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-01-18 16:25:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1230. [2022-01-18 16:25:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.0268510984540278) internal successors, (2491), 1229 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2491 transitions. [2022-01-18 16:25:53,192 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2491 transitions. Word has length 33 [2022-01-18 16:25:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:53,192 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2491 transitions. [2022-01-18 16:25:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2491 transitions. [2022-01-18 16:25:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:53,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:53,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:53,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:53,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:53,409 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:53,409 INFO L85 PathProgramCache]: Analyzing trace with hash 508159906, now seen corresponding path program 172 times [2022-01-18 16:25:53,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:53,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710155796] [2022-01-18 16:25:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:53,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:53,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:53,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710155796] [2022-01-18 16:25:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710155796] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:53,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814263873] [2022-01-18 16:25:53,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:25:53,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:53,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:53,603 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:53,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 16:25:53,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:25:53,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:53,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:53,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:53,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:53,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:25:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:54,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:54,308 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:54,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:54,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814263873] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:54,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:54,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:54,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713424094] [2022-01-18 16:25:54,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:54,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:54,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:54,350 INFO L87 Difference]: Start difference. First operand 1230 states and 2491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:55,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:55,866 INFO L93 Difference]: Finished difference Result 1609 states and 3206 transitions. [2022-01-18 16:25:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:25:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:55,868 INFO L225 Difference]: With dead ends: 1609 [2022-01-18 16:25:55,868 INFO L226 Difference]: Without dead ends: 1540 [2022-01-18 16:25:55,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=776, Invalid=8344, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:25:55,869 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:55,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 480 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1571 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-01-18 16:25:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-01-18 16:25:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1229. [2022-01-18 16:25:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.022801302931596) internal successors, (2484), 1228 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2484 transitions. [2022-01-18 16:25:55,880 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2484 transitions. Word has length 33 [2022-01-18 16:25:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:55,880 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2484 transitions. [2022-01-18 16:25:55,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2484 transitions. [2022-01-18 16:25:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:55,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:55,881 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:55,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:56,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:56,096 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:56,096 INFO L85 PathProgramCache]: Analyzing trace with hash 239017020, now seen corresponding path program 173 times [2022-01-18 16:25:56,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:56,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349236785] [2022-01-18 16:25:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:56,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:56,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349236785] [2022-01-18 16:25:56,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349236785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859967675] [2022-01-18 16:25:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:25:56,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:56,391 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:56,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 16:25:56,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:25:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:56,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:25:56,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:56,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:25:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:56,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:25:57,294 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:25:57,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:25:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859967675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:25:57,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:25:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:25:57,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819963074] [2022-01-18 16:25:57,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:25:57,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:25:57,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:25:57,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:25:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:25:57,339 INFO L87 Difference]: Start difference. First operand 1229 states and 2484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:25:58,922 INFO L93 Difference]: Finished difference Result 1709 states and 3406 transitions. [2022-01-18 16:25:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:25:58,922 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:25:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:25:58,923 INFO L225 Difference]: With dead ends: 1709 [2022-01-18 16:25:58,923 INFO L226 Difference]: Without dead ends: 1577 [2022-01-18 16:25:58,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=771, Invalid=7785, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 16:25:58,924 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 230 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:25:58,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 448 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1757 Invalid, 0 Unknown, 310 Unchecked, 0.5s Time] [2022-01-18 16:25:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2022-01-18 16:25:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1200. [2022-01-18 16:25:58,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.029190992493745) internal successors, (2433), 1199 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2433 transitions. [2022-01-18 16:25:58,934 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2433 transitions. Word has length 33 [2022-01-18 16:25:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:25:58,935 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 2433 transitions. [2022-01-18 16:25:58,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:25:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2433 transitions. [2022-01-18 16:25:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:25:58,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:25:58,936 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:25:58,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-01-18 16:25:59,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:59,150 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:25:59,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:25:59,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1624798828, now seen corresponding path program 174 times [2022-01-18 16:25:59,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:25:59,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907237735] [2022-01-18 16:25:59,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:25:59,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:25:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:25:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:25:59,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:25:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907237735] [2022-01-18 16:25:59,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907237735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:25:59,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559879368] [2022-01-18 16:25:59,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:25:59,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:25:59,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:25:59,416 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:25:59,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 16:25:59,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:25:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:25:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:25:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:25:59,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:25:59,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:25:59,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:26:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:00,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:00,543 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:00,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:26:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559879368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:00,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:00,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:26:00,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972261465] [2022-01-18 16:26:00,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:00,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:26:00,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:26:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:26:00,612 INFO L87 Difference]: Start difference. First operand 1200 states and 2433 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:04,090 INFO L93 Difference]: Finished difference Result 1764 states and 3518 transitions. [2022-01-18 16:26:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-18 16:26:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:04,091 INFO L225 Difference]: With dead ends: 1764 [2022-01-18 16:26:04,091 INFO L226 Difference]: Without dead ends: 1664 [2022-01-18 16:26:04,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1122, Invalid=12218, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 16:26:04,092 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:04,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 662 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2981 Invalid, 0 Unknown, 268 Unchecked, 1.1s Time] [2022-01-18 16:26:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-01-18 16:26:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1206. [2022-01-18 16:26:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.029045643153527) internal successors, (2445), 1205 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2445 transitions. [2022-01-18 16:26:04,103 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2445 transitions. Word has length 33 [2022-01-18 16:26:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:04,103 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2445 transitions. [2022-01-18 16:26:04,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2445 transitions. [2022-01-18 16:26:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:04,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:04,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:04,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:04,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 16:26:04,319 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:04,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1253520918, now seen corresponding path program 175 times [2022-01-18 16:26:04,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:04,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163141483] [2022-01-18 16:26:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:04,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:04,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:04,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163141483] [2022-01-18 16:26:04,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163141483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:04,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829788487] [2022-01-18 16:26:04,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:04,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:04,494 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:04,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 16:26:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:04,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:04,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:05,176 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:05,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:05,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829788487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:05,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:05,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:05,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021897715] [2022-01-18 16:26:05,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:05,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:05,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:05,225 INFO L87 Difference]: Start difference. First operand 1206 states and 2445 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:07,563 INFO L93 Difference]: Finished difference Result 1801 states and 3617 transitions. [2022-01-18 16:26:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:26:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:07,566 INFO L225 Difference]: With dead ends: 1801 [2022-01-18 16:26:07,566 INFO L226 Difference]: Without dead ends: 1725 [2022-01-18 16:26:07,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1015, Invalid=10757, Unknown=0, NotChecked=0, Total=11772 [2022-01-18 16:26:07,567 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:07,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 419 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1429 Invalid, 0 Unknown, 205 Unchecked, 0.6s Time] [2022-01-18 16:26:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-01-18 16:26:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1204. [2022-01-18 16:26:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.0290939318370738) internal successors, (2441), 1203 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2441 transitions. [2022-01-18 16:26:07,578 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2441 transitions. Word has length 33 [2022-01-18 16:26:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:07,578 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2441 transitions. [2022-01-18 16:26:07,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2441 transitions. [2022-01-18 16:26:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:07,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:07,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:07,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:07,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:07,789 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2029057878, now seen corresponding path program 176 times [2022-01-18 16:26:07,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:07,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316090742] [2022-01-18 16:26:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:07,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:08,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316090742] [2022-01-18 16:26:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316090742] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159082330] [2022-01-18 16:26:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:08,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:08,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:08,040 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:08,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 16:26:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:08,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:08,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:08,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:08,760 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:08,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:08,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159082330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:08,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:08,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:08,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374666428] [2022-01-18 16:26:08,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:08,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:08,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:08,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:08,807 INFO L87 Difference]: Start difference. First operand 1204 states and 2441 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:11,792 INFO L93 Difference]: Finished difference Result 1974 states and 3932 transitions. [2022-01-18 16:26:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-18 16:26:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:11,794 INFO L225 Difference]: With dead ends: 1974 [2022-01-18 16:26:11,794 INFO L226 Difference]: Without dead ends: 1835 [2022-01-18 16:26:11,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5706 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1652, Invalid=15378, Unknown=0, NotChecked=0, Total=17030 [2022-01-18 16:26:11,795 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 308 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:11,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 682 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2572 Invalid, 0 Unknown, 770 Unchecked, 0.8s Time] [2022-01-18 16:26:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-01-18 16:26:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1183. [2022-01-18 16:26:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.029610829103215) internal successors, (2399), 1182 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2399 transitions. [2022-01-18 16:26:11,807 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2399 transitions. Word has length 33 [2022-01-18 16:26:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:11,807 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 2399 transitions. [2022-01-18 16:26:11,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2399 transitions. [2022-01-18 16:26:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:11,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:11,809 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:11,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 16:26:12,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:12,024 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -839667052, now seen corresponding path program 177 times [2022-01-18 16:26:12,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629781063] [2022-01-18 16:26:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:12,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:12,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629781063] [2022-01-18 16:26:12,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629781063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569493247] [2022-01-18 16:26:12,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:12,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:12,239 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:12,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 16:26:12,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:26:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:26:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:12,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:12,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:12,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:13,035 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:13,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:26:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:13,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569493247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:13,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:13,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:26:13,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900086798] [2022-01-18 16:26:13,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:26:13,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:26:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:26:13,069 INFO L87 Difference]: Start difference. First operand 1183 states and 2399 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:26:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:17,149 INFO L93 Difference]: Finished difference Result 2048 states and 4049 transitions. [2022-01-18 16:26:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-18 16:26:17,150 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:17,152 INFO L225 Difference]: With dead ends: 2048 [2022-01-18 16:26:17,152 INFO L226 Difference]: Without dead ends: 1950 [2022-01-18 16:26:17,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2163, Invalid=20789, Unknown=0, NotChecked=0, Total=22952 [2022-01-18 16:26:17,153 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 396 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3352 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 3352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:17,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 645 Invalid, 4080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 3352 Invalid, 0 Unknown, 509 Unchecked, 1.0s Time] [2022-01-18 16:26:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-01-18 16:26:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1187. [2022-01-18 16:26:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-01-18 16:26:17,166 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-01-18 16:26:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:17,166 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-01-18 16:26:17,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:26:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-01-18 16:26:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:17,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:17,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:17,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:17,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 16:26:17,371 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:17,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:17,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1860382340, now seen corresponding path program 178 times [2022-01-18 16:26:17,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:17,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518351911] [2022-01-18 16:26:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:17,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:17,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518351911] [2022-01-18 16:26:17,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518351911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938792187] [2022-01-18 16:26:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:17,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:17,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:17,591 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:17,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 16:26:17,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:17,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:18,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:18,365 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:18,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938792187] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:18,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:18,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:18,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822998245] [2022-01-18 16:26:18,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:18,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:18,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:18,422 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:20,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:20,950 INFO L93 Difference]: Finished difference Result 1796 states and 3592 transitions. [2022-01-18 16:26:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-18 16:26:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:20,952 INFO L225 Difference]: With dead ends: 1796 [2022-01-18 16:26:20,952 INFO L226 Difference]: Without dead ends: 1672 [2022-01-18 16:26:20,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=937, Invalid=9569, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:26:20,953 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:20,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 585 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1966 Invalid, 0 Unknown, 588 Unchecked, 0.7s Time] [2022-01-18 16:26:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-01-18 16:26:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1193. [2022-01-18 16:26:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-01-18 16:26:20,964 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-01-18 16:26:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:20,964 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-01-18 16:26:20,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-01-18 16:26:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:20,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:20,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:20,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:21,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:21,181 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:21,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:21,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1219271750, now seen corresponding path program 179 times [2022-01-18 16:26:21,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:21,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133308991] [2022-01-18 16:26:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:21,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:21,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133308991] [2022-01-18 16:26:21,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133308991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:21,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710438114] [2022-01-18 16:26:21,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:21,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:21,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:21,370 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 16:26:21,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:26:21,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:21,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:21,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:22,351 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:22,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:26:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:22,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710438114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:22,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:22,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:26:22,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299869788] [2022-01-18 16:26:22,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:22,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:26:22,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:22,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:26:22,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:26:22,397 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:26:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:25,674 INFO L93 Difference]: Finished difference Result 1777 states and 3563 transitions. [2022-01-18 16:26:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 16:26:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:25,676 INFO L225 Difference]: With dead ends: 1777 [2022-01-18 16:26:25,676 INFO L226 Difference]: Without dead ends: 1713 [2022-01-18 16:26:25,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4212 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1268, Invalid=12072, Unknown=0, NotChecked=0, Total=13340 [2022-01-18 16:26:25,677 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 247 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:25,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 549 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2407 Invalid, 0 Unknown, 225 Unchecked, 1.0s Time] [2022-01-18 16:26:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-01-18 16:26:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1198. [2022-01-18 16:26:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.026733500417711) internal successors, (2426), 1197 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:25,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2426 transitions. [2022-01-18 16:26:25,690 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2426 transitions. Word has length 33 [2022-01-18 16:26:25,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:25,690 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 2426 transitions. [2022-01-18 16:26:25,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:26:25,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2426 transitions. [2022-01-18 16:26:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:25,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:25,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:25,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:25,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:25,908 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1781082480, now seen corresponding path program 180 times [2022-01-18 16:26:25,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936668765] [2022-01-18 16:26:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:25,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:26,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936668765] [2022-01-18 16:26:26,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936668765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025867324] [2022-01-18 16:26:26,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:26,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:26,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:26,173 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:26,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 16:26:26,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:26:26,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:26:26,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:26,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:26,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:26:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:26,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:27,187 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:27,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:27,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025867324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:27,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:27,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:27,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370512329] [2022-01-18 16:26:27,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:27,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:27,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:27,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:27,245 INFO L87 Difference]: Start difference. First operand 1198 states and 2426 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:30,099 INFO L93 Difference]: Finished difference Result 1769 states and 3565 transitions. [2022-01-18 16:26:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-18 16:26:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:30,101 INFO L225 Difference]: With dead ends: 1769 [2022-01-18 16:26:30,101 INFO L226 Difference]: Without dead ends: 1737 [2022-01-18 16:26:30,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3482 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1159, Invalid=10183, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 16:26:30,102 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:30,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 492 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1930 Invalid, 0 Unknown, 619 Unchecked, 0.7s Time] [2022-01-18 16:26:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-01-18 16:26:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1193. [2022-01-18 16:26:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-01-18 16:26:30,114 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-01-18 16:26:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:30,114 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-01-18 16:26:30,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-01-18 16:26:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:30,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:30,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:30,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:30,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:30,331 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:30,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash 79243836, now seen corresponding path program 181 times [2022-01-18 16:26:30,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:30,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382759055] [2022-01-18 16:26:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:30,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:30,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382759055] [2022-01-18 16:26:30,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382759055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:30,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945629974] [2022-01-18 16:26:30,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:30,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:30,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:30,513 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:30,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 16:26:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:30,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:30,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:31,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:31,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:31,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:31,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945629974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:31,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:31,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:31,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875084928] [2022-01-18 16:26:31,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:31,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:31,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:31,536 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:34,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:34,221 INFO L93 Difference]: Finished difference Result 1679 states and 3360 transitions. [2022-01-18 16:26:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 16:26:34,222 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:34,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:34,224 INFO L225 Difference]: With dead ends: 1679 [2022-01-18 16:26:34,224 INFO L226 Difference]: Without dead ends: 1615 [2022-01-18 16:26:34,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1087, Invalid=9419, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:26:34,226 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 212 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:34,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 385 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1889 Invalid, 0 Unknown, 120 Unchecked, 0.8s Time] [2022-01-18 16:26:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-01-18 16:26:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1187. [2022-01-18 16:26:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-01-18 16:26:34,243 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-01-18 16:26:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:34,243 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-01-18 16:26:34,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:34,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-01-18 16:26:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:34,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:34,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:34,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:34,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:34,460 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:34,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1754299798, now seen corresponding path program 182 times [2022-01-18 16:26:34,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:34,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706976120] [2022-01-18 16:26:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:34,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:34,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706976120] [2022-01-18 16:26:34,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706976120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554847993] [2022-01-18 16:26:34,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:34,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:34,686 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:34,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 16:26:34,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:34,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:26:34,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:34,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:34,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:35,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:35,614 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:35,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:35,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554847993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:35,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:35,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:35,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659732869] [2022-01-18 16:26:35,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:35,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:35,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:35,716 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:38,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:38,789 INFO L93 Difference]: Finished difference Result 1726 states and 3436 transitions. [2022-01-18 16:26:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-18 16:26:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:38,791 INFO L225 Difference]: With dead ends: 1726 [2022-01-18 16:26:38,792 INFO L226 Difference]: Without dead ends: 1621 [2022-01-18 16:26:38,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4143 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1334, Invalid=12472, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 16:26:38,793 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 316 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:38,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 467 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2297 Invalid, 0 Unknown, 68 Unchecked, 0.9s Time] [2022-01-18 16:26:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-01-18 16:26:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1209. [2022-01-18 16:26:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.0264900662251657) internal successors, (2448), 1208 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2448 transitions. [2022-01-18 16:26:38,827 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2448 transitions. Word has length 33 [2022-01-18 16:26:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:38,827 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2448 transitions. [2022-01-18 16:26:38,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2448 transitions. [2022-01-18 16:26:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:38,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:38,828 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:38,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:39,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:39,052 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:39,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1258121136, now seen corresponding path program 183 times [2022-01-18 16:26:39,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:39,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647473662] [2022-01-18 16:26:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:39,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:39,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647473662] [2022-01-18 16:26:39,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647473662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404544836] [2022-01-18 16:26:39,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:39,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:39,332 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:39,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 16:26:39,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:26:39,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:39,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:39,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:40,406 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:40,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:40,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404544836] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:40,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:40,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 16:26:40,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070775591] [2022-01-18 16:26:40,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:40,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:26:40,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:26:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:26:40,497 INFO L87 Difference]: Start difference. First operand 1209 states and 2448 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:43,353 INFO L93 Difference]: Finished difference Result 1732 states and 3449 transitions. [2022-01-18 16:26:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 16:26:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:43,356 INFO L225 Difference]: With dead ends: 1732 [2022-01-18 16:26:43,356 INFO L226 Difference]: Without dead ends: 1612 [2022-01-18 16:26:43,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=896, Invalid=8416, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 16:26:43,356 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 273 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:43,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 471 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2083 Invalid, 0 Unknown, 352 Unchecked, 0.9s Time] [2022-01-18 16:26:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-01-18 16:26:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1229. [2022-01-18 16:26:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.02442996742671) internal successors, (2486), 1228 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2486 transitions. [2022-01-18 16:26:43,368 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2486 transitions. Word has length 33 [2022-01-18 16:26:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2486 transitions. [2022-01-18 16:26:43,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2486 transitions. [2022-01-18 16:26:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:43,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:43,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:43,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:43,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 16:26:43,586 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:43,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1899231726, now seen corresponding path program 184 times [2022-01-18 16:26:43,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:43,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409469383] [2022-01-18 16:26:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:43,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:43,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:43,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409469383] [2022-01-18 16:26:43,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409469383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:43,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898819840] [2022-01-18 16:26:43,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:43,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:43,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:43,900 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:43,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 16:26:43,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:44,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:44,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:44,969 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:44,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:26:45,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:45,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898819840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:45,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:45,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 16:26:45,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454401899] [2022-01-18 16:26:45,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:45,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:26:45,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:45,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:26:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:26:45,087 INFO L87 Difference]: Start difference. First operand 1229 states and 2486 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:47,702 INFO L93 Difference]: Finished difference Result 1886 states and 3776 transitions. [2022-01-18 16:26:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 16:26:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:47,705 INFO L225 Difference]: With dead ends: 1886 [2022-01-18 16:26:47,705 INFO L226 Difference]: Without dead ends: 1822 [2022-01-18 16:26:47,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1064, Invalid=9238, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:26:47,706 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:47,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 432 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1999 Invalid, 0 Unknown, 309 Unchecked, 0.8s Time] [2022-01-18 16:26:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-01-18 16:26:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2022-01-18 16:26:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.0265486725663715) internal successors, (2519), 1243 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 2519 transitions. [2022-01-18 16:26:47,717 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 2519 transitions. Word has length 33 [2022-01-18 16:26:47,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:47,718 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 2519 transitions. [2022-01-18 16:26:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 2519 transitions. [2022-01-18 16:26:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:47,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:47,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:47,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 16:26:47,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-01-18 16:26:47,919 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:47,919 INFO L85 PathProgramCache]: Analyzing trace with hash -472989360, now seen corresponding path program 185 times [2022-01-18 16:26:47,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:47,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5945828] [2022-01-18 16:26:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:47,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:48,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5945828] [2022-01-18 16:26:48,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5945828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:48,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328133610] [2022-01-18 16:26:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:48,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:48,176 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:48,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 16:26:48,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:48,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:48,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:26:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:48,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:48,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:48,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:26:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:48,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:49,156 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:49,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:26:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:49,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328133610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:49,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:49,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-01-18 16:26:49,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446194815] [2022-01-18 16:26:49,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:49,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:49,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:26:49,198 INFO L87 Difference]: Start difference. First operand 1244 states and 2519 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 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) [2022-01-18 16:26:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:53,826 INFO L93 Difference]: Finished difference Result 2122 states and 4200 transitions. [2022-01-18 16:26:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-18 16:26:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:53,849 INFO L225 Difference]: With dead ends: 2122 [2022-01-18 16:26:53,849 INFO L226 Difference]: Without dead ends: 1989 [2022-01-18 16:26:53,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7265 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2152, Invalid=19604, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:26:53,850 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 468 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:53,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 610 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3106 Invalid, 0 Unknown, 397 Unchecked, 1.1s Time] [2022-01-18 16:26:53,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2022-01-18 16:26:53,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1238. [2022-01-18 16:26:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.0234438156831045) internal successors, (2503), 1237 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2503 transitions. [2022-01-18 16:26:53,861 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2503 transitions. Word has length 33 [2022-01-18 16:26:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:53,862 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2503 transitions. [2022-01-18 16:26:53,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 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) [2022-01-18 16:26:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2503 transitions. [2022-01-18 16:26:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:53,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:53,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:53,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:54,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-01-18 16:26:54,065 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:54,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1301364348, now seen corresponding path program 186 times [2022-01-18 16:26:54,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:54,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353697560] [2022-01-18 16:26:54,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:54,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:54,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353697560] [2022-01-18 16:26:54,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353697560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:54,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932780970] [2022-01-18 16:26:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:54,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:54,364 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:54,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 16:26:54,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:26:54,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:54,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:54,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:54,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:54,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:26:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:55,538 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:55,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-01-18 16:26:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932780970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:55,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:55,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-01-18 16:26:55,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128862248] [2022-01-18 16:26:55,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:55,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:26:55,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:55,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:26:55,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:26:55,591 INFO L87 Difference]: Start difference. First operand 1238 states and 2503 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:58,017 INFO L93 Difference]: Finished difference Result 2004 states and 3972 transitions. [2022-01-18 16:26:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 16:26:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:26:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:58,020 INFO L225 Difference]: With dead ends: 2004 [2022-01-18 16:26:58,020 INFO L226 Difference]: Without dead ends: 1896 [2022-01-18 16:26:58,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=946, Invalid=9560, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:26:58,021 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:58,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 406 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2133 Invalid, 0 Unknown, 389 Unchecked, 0.8s Time] [2022-01-18 16:26:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-01-18 16:26:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1286. [2022-01-18 16:26:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 2.0155642023346303) internal successors, (2590), 1285 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 2590 transitions. [2022-01-18 16:26:58,036 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 2590 transitions. Word has length 33 [2022-01-18 16:26:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 2590 transitions. [2022-01-18 16:26:58,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 2590 transitions. [2022-01-18 16:26:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:58,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:58,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:58,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:58,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:58,244 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:26:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:58,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1044174664, now seen corresponding path program 187 times [2022-01-18 16:26:58,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:58,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674998560] [2022-01-18 16:26:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:58,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:58,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674998560] [2022-01-18 16:26:58,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674998560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960216574] [2022-01-18 16:26:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:58,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:58,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:58,532 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:26:58,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 16:26:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:58,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:26:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:58,861 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:26:58,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:26:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:59,482 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:26:59,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:26:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:59,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960216574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:59,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:59,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:26:59,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901741503] [2022-01-18 16:26:59,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:59,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:26:59,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:26:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:26:59,553 INFO L87 Difference]: Start difference. First operand 1286 states and 2590 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:00,762 INFO L93 Difference]: Finished difference Result 1760 states and 3517 transitions. [2022-01-18 16:27:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:27:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:00,765 INFO L225 Difference]: With dead ends: 1760 [2022-01-18 16:27:00,765 INFO L226 Difference]: Without dead ends: 1712 [2022-01-18 16:27:00,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=455, Invalid=5095, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:27:00,765 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:00,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 430 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:27:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-01-18 16:27:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1292. [2022-01-18 16:27:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.017815646785438) internal successors, (2605), 1291 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2605 transitions. [2022-01-18 16:27:00,778 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2605 transitions. Word has length 33 [2022-01-18 16:27:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:00,778 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2605 transitions. [2022-01-18 16:27:00,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2605 transitions. [2022-01-18 16:27:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:00,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:00,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:00,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:00,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:00,995 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:00,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:00,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1971420918, now seen corresponding path program 188 times [2022-01-18 16:27:00,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:00,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556390850] [2022-01-18 16:27:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:00,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:01,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556390850] [2022-01-18 16:27:01,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556390850] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67953381] [2022-01-18 16:27:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:01,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:01,331 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:01,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 16:27:01,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:01,732 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:27:01,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:27:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:01,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:02,367 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:02,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67953381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:02,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:02,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:02,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389309444] [2022-01-18 16:27:02,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:02,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:02,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:02,438 INFO L87 Difference]: Start difference. First operand 1292 states and 2605 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:04,014 INFO L93 Difference]: Finished difference Result 1826 states and 3642 transitions. [2022-01-18 16:27:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 16:27:04,014 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:04,016 INFO L225 Difference]: With dead ends: 1826 [2022-01-18 16:27:04,016 INFO L226 Difference]: Without dead ends: 1778 [2022-01-18 16:27:04,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=577, Invalid=6229, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:27:04,017 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 191 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:04,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 560 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:27:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-01-18 16:27:04,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1293. [2022-01-18 16:27:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.0178018575851393) internal successors, (2607), 1292 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 2607 transitions. [2022-01-18 16:27:04,029 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 2607 transitions. Word has length 33 [2022-01-18 16:27:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:04,030 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 2607 transitions. [2022-01-18 16:27:04,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 2607 transitions. [2022-01-18 16:27:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:04,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:04,031 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:04,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 16:27:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:04,247 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:04,247 INFO L85 PathProgramCache]: Analyzing trace with hash -585798328, now seen corresponding path program 189 times [2022-01-18 16:27:04,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:04,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906413125] [2022-01-18 16:27:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:04,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906413125] [2022-01-18 16:27:04,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906413125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:04,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947104439] [2022-01-18 16:27:04,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:04,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:04,538 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:04,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 16:27:04,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:27:04,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:04,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:27:04,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:04,909 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:04,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:05,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:05,521 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:05,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:05,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947104439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:05,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:05,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:05,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525843150] [2022-01-18 16:27:05,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:05,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:05,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:05,600 INFO L87 Difference]: Start difference. First operand 1293 states and 2607 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:08,223 INFO L93 Difference]: Finished difference Result 2066 states and 4115 transitions. [2022-01-18 16:27:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 16:27:08,223 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:08,225 INFO L225 Difference]: With dead ends: 2066 [2022-01-18 16:27:08,226 INFO L226 Difference]: Without dead ends: 2018 [2022-01-18 16:27:08,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=768, Invalid=7604, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 16:27:08,226 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 244 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:08,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 805 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:27:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-01-18 16:27:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1294. [2022-01-18 16:27:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-01-18 16:27:08,244 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-01-18 16:27:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:08,244 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-01-18 16:27:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-01-18 16:27:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:08,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:08,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:08,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:08,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-01-18 16:27:08,462 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:08,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1226908918, now seen corresponding path program 190 times [2022-01-18 16:27:08,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:08,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489614446] [2022-01-18 16:27:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:08,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:08,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489614446] [2022-01-18 16:27:08,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489614446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:08,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885677070] [2022-01-18 16:27:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:08,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:08,751 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:08,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 16:27:08,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:08,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:08,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:09,070 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:09,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:09,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:09,681 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:09,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:09,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885677070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:09,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:09,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:09,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586388242] [2022-01-18 16:27:09,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:09,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:09,726 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:12,431 INFO L93 Difference]: Finished difference Result 1996 states and 3980 transitions. [2022-01-18 16:27:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-18 16:27:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:12,434 INFO L225 Difference]: With dead ends: 1996 [2022-01-18 16:27:12,434 INFO L226 Difference]: Without dead ends: 1964 [2022-01-18 16:27:12,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=892, Invalid=8228, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 16:27:12,435 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:12,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 626 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:27:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-01-18 16:27:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1294. [2022-01-18 16:27:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:12,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-01-18 16:27:12,447 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-01-18 16:27:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:12,447 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-01-18 16:27:12,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-01-18 16:27:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:12,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:12,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:12,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:12,657 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:12,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash 199333448, now seen corresponding path program 191 times [2022-01-18 16:27:12,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:12,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875115415] [2022-01-18 16:27:12,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:12,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:12,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875115415] [2022-01-18 16:27:12,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875115415] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924068030] [2022-01-18 16:27:12,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:12,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:12,903 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:12,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 16:27:12,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:27:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:12,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-18 16:27:12,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:13,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:13,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:27:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:13,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:13,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:13,947 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:27:13,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 57 [2022-01-18 16:27:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:14,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924068030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:14,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:14,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:27:14,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393827680] [2022-01-18 16:27:14,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:14,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:27:14,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:27:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:27:14,084 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:20,552 INFO L93 Difference]: Finished difference Result 2365 states and 4672 transitions. [2022-01-18 16:27:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-18 16:27:20,553 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:20,555 INFO L225 Difference]: With dead ends: 2365 [2022-01-18 16:27:20,555 INFO L226 Difference]: Without dead ends: 2222 [2022-01-18 16:27:20,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9432 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2867, Invalid=24855, Unknown=0, NotChecked=0, Total=27722 [2022-01-18 16:27:20,557 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 494 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:20,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 742 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3095 Invalid, 0 Unknown, 922 Unchecked, 1.3s Time] [2022-01-18 16:27:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-01-18 16:27:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1308. [2022-01-18 16:27:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0153022188217293) internal successors, (2634), 1307 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2634 transitions. [2022-01-18 16:27:20,570 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2634 transitions. Word has length 33 [2022-01-18 16:27:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2634 transitions. [2022-01-18 16:27:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2634 transitions. [2022-01-18 16:27:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:20,572 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:20,572 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:20,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:20,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:20,787 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash 476250482, now seen corresponding path program 192 times [2022-01-18 16:27:20,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:20,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157811678] [2022-01-18 16:27:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:20,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:21,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157811678] [2022-01-18 16:27:21,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157811678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586662923] [2022-01-18 16:27:21,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:27:21,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:21,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:21,043 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:21,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 16:27:21,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:27:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:21,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:27:21,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:21,303 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:21,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:21,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:21,714 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:21,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:21,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586662923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:21,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:21,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:21,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440361316] [2022-01-18 16:27:21,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:21,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:21,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:21,765 INFO L87 Difference]: Start difference. First operand 1308 states and 2634 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:23,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:23,651 INFO L93 Difference]: Finished difference Result 1954 states and 3914 transitions. [2022-01-18 16:27:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:27:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:23,653 INFO L225 Difference]: With dead ends: 1954 [2022-01-18 16:27:23,653 INFO L226 Difference]: Without dead ends: 1910 [2022-01-18 16:27:23,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=999, Invalid=8507, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:27:23,653 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 243 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:23,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 474 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:27:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-01-18 16:27:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1306. [2022-01-18 16:27:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.0153256704980844) internal successors, (2630), 1305 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2630 transitions. [2022-01-18 16:27:23,665 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2630 transitions. Word has length 33 [2022-01-18 16:27:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 2630 transitions. [2022-01-18 16:27:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2630 transitions. [2022-01-18 16:27:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:23,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:23,666 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:23,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:23,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:23,882 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:23,882 INFO L85 PathProgramCache]: Analyzing trace with hash -438382264, now seen corresponding path program 193 times [2022-01-18 16:27:23,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:23,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031872210] [2022-01-18 16:27:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:23,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:24,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031872210] [2022-01-18 16:27:24,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031872210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:24,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339447162] [2022-01-18 16:27:24,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:27:24,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:24,143 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:24,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 16:27:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:24,431 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:24,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:24,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:25,057 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:25,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:25,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:25,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339447162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:25,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:25,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:25,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794437526] [2022-01-18 16:27:25,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:25,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:25,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:25,116 INFO L87 Difference]: Start difference. First operand 1306 states and 2630 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:26,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:26,264 INFO L93 Difference]: Finished difference Result 1832 states and 3678 transitions. [2022-01-18 16:27:26,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:27:26,264 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:26,266 INFO L225 Difference]: With dead ends: 1832 [2022-01-18 16:27:26,266 INFO L226 Difference]: Without dead ends: 1804 [2022-01-18 16:27:26,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=546, Invalid=5306, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 16:27:26,267 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:26,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 471 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:27:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-01-18 16:27:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1298. [2022-01-18 16:27:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.015420200462606) internal successors, (2614), 1297 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2614 transitions. [2022-01-18 16:27:26,278 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2614 transitions. Word has length 33 [2022-01-18 16:27:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:26,278 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 2614 transitions. [2022-01-18 16:27:26,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2614 transitions. [2022-01-18 16:27:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:26,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:26,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:26,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:26,495 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2038241542, now seen corresponding path program 194 times [2022-01-18 16:27:26,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:26,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994283100] [2022-01-18 16:27:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:26,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:26,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994283100] [2022-01-18 16:27:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994283100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041278659] [2022-01-18 16:27:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:26,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:26,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:26,683 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 16:27:26,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:26,943 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:27:26,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:27:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:27,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:27,321 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:27,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041278659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:27,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:27,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:27,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138485480] [2022-01-18 16:27:27,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:27,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:27,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:27,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:27,360 INFO L87 Difference]: Start difference. First operand 1298 states and 2614 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:28,977 INFO L93 Difference]: Finished difference Result 1795 states and 3575 transitions. [2022-01-18 16:27:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:27:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:28,979 INFO L225 Difference]: With dead ends: 1795 [2022-01-18 16:27:28,979 INFO L226 Difference]: Without dead ends: 1699 [2022-01-18 16:27:28,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=697, Invalid=7313, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 16:27:28,979 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:28,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 531 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:27:28,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-01-18 16:27:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1310. [2022-01-18 16:27:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.0168067226890756) internal successors, (2640), 1309 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2640 transitions. [2022-01-18 16:27:28,990 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2640 transitions. Word has length 33 [2022-01-18 16:27:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:28,990 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 2640 transitions. [2022-01-18 16:27:28,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2640 transitions. [2022-01-18 16:27:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:28,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:28,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:29,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:29,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 16:27:29,206 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash -871103164, now seen corresponding path program 195 times [2022-01-18 16:27:29,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:29,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13831269] [2022-01-18 16:27:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:29,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:29,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13831269] [2022-01-18 16:27:29,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13831269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:29,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703781666] [2022-01-18 16:27:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:29,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:29,420 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:29,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 16:27:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:27:29,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:29,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:29,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:29,665 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:29,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:29,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:30,042 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:30,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:30,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703781666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:30,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:30,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:30,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346580105] [2022-01-18 16:27:30,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:30,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:30,076 INFO L87 Difference]: Start difference. First operand 1310 states and 2640 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:33,161 INFO L93 Difference]: Finished difference Result 1955 states and 3889 transitions. [2022-01-18 16:27:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:27:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:33,164 INFO L225 Difference]: With dead ends: 1955 [2022-01-18 16:27:33,164 INFO L226 Difference]: Without dead ends: 1818 [2022-01-18 16:27:33,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1138, Invalid=11518, Unknown=0, NotChecked=0, Total=12656 [2022-01-18 16:27:33,165 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 272 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:33,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 686 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:27:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-01-18 16:27:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1309. [2022-01-18 16:27:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 2.014525993883792) internal successors, (2635), 1308 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2635 transitions. [2022-01-18 16:27:33,177 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2635 transitions. Word has length 33 [2022-01-18 16:27:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:33,177 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 2635 transitions. [2022-01-18 16:27:33,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2635 transitions. [2022-01-18 16:27:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:33,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:33,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:33,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 16:27:33,381 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1512213754, now seen corresponding path program 196 times [2022-01-18 16:27:33,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686938531] [2022-01-18 16:27:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:33,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:33,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686938531] [2022-01-18 16:27:33,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686938531] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810167092] [2022-01-18 16:27:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:27:33,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:33,553 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:33,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 16:27:33,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:27:33,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:33,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:33,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:33,777 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:33,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:33,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:34,167 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:34,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:34,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810167092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:34,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:34,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:34,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762946037] [2022-01-18 16:27:34,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:34,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:34,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:34,208 INFO L87 Difference]: Start difference. First operand 1309 states and 2635 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:36,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:36,974 INFO L93 Difference]: Finished difference Result 1964 states and 3913 transitions. [2022-01-18 16:27:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-18 16:27:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:36,976 INFO L225 Difference]: With dead ends: 1964 [2022-01-18 16:27:36,977 INFO L226 Difference]: Without dead ends: 1875 [2022-01-18 16:27:36,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1479, Invalid=12563, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:27:36,977 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 274 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:36,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 497 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:27:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-01-18 16:27:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1302. [2022-01-18 16:27:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.0146041506533434) internal successors, (2621), 1301 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2621 transitions. [2022-01-18 16:27:36,989 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2621 transitions. Word has length 33 [2022-01-18 16:27:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:36,990 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 2621 transitions. [2022-01-18 16:27:36,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:36,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2621 transitions. [2022-01-18 16:27:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:36,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:36,991 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:37,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:37,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 16:27:37,204 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1000604134, now seen corresponding path program 197 times [2022-01-18 16:27:37,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885244579] [2022-01-18 16:27:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:37,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:37,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885244579] [2022-01-18 16:27:37,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885244579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:37,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830685668] [2022-01-18 16:27:37,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:27:37,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:37,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:37,390 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:37,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 16:27:37,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:27:37,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:37,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:27:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:37,594 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:37,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:38,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:38,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:38,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830685668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:38,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:38,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:38,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674433047] [2022-01-18 16:27:38,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:38,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:38,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:38,074 INFO L87 Difference]: Start difference. First operand 1302 states and 2621 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:40,272 INFO L93 Difference]: Finished difference Result 1848 states and 3673 transitions. [2022-01-18 16:27:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:27:40,273 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:40,274 INFO L225 Difference]: With dead ends: 1848 [2022-01-18 16:27:40,274 INFO L226 Difference]: Without dead ends: 1764 [2022-01-18 16:27:40,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1048, Invalid=9458, Unknown=0, NotChecked=0, Total=10506 [2022-01-18 16:27:40,275 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 225 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 3035 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:40,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 616 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3035 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:27:40,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-01-18 16:27:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1322. [2022-01-18 16:27:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.0143830431491296) internal successors, (2661), 1321 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2661 transitions. [2022-01-18 16:27:40,286 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2661 transitions. Word has length 33 [2022-01-18 16:27:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:40,286 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2661 transitions. [2022-01-18 16:27:40,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2661 transitions. [2022-01-18 16:27:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:40,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:40,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:40,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:40,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 16:27:40,503 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:40,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1710926648, now seen corresponding path program 198 times [2022-01-18 16:27:40,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:40,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042878985] [2022-01-18 16:27:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:40,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:40,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042878985] [2022-01-18 16:27:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042878985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793947096] [2022-01-18 16:27:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:27:40,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:40,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:40,678 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:40,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 16:27:40,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:27:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:27:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:40,936 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:40,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:41,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:41,343 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:41,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:41,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793947096] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:41,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:41,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:41,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221062446] [2022-01-18 16:27:41,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:41,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:41,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:41,402 INFO L87 Difference]: Start difference. First operand 1322 states and 2661 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:44,162 INFO L93 Difference]: Finished difference Result 2051 states and 4084 transitions. [2022-01-18 16:27:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-18 16:27:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:44,164 INFO L225 Difference]: With dead ends: 2051 [2022-01-18 16:27:44,165 INFO L226 Difference]: Without dead ends: 1923 [2022-01-18 16:27:44,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=939, Invalid=11493, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:27:44,166 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:44,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 479 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:27:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-01-18 16:27:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1447. [2022-01-18 16:27:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 2.024204702627939) internal successors, (2927), 1446 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2927 transitions. [2022-01-18 16:27:44,179 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2927 transitions. Word has length 33 [2022-01-18 16:27:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 2927 transitions. [2022-01-18 16:27:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2927 transitions. [2022-01-18 16:27:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:44,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:44,180 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:44,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:44,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:44,395 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:44,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:44,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1198418058, now seen corresponding path program 199 times [2022-01-18 16:27:44,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:44,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835385301] [2022-01-18 16:27:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:44,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:44,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835385301] [2022-01-18 16:27:44,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835385301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:44,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382918474] [2022-01-18 16:27:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:27:44,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:44,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:44,652 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 16:27:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:44,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:44,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:45,015 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:27:45,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:27:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:45,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:45,552 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:45,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:45,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382918474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:45,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:45,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:45,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235846759] [2022-01-18 16:27:45,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:45,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:45,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:45,620 INFO L87 Difference]: Start difference. First operand 1447 states and 2927 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:50,687 INFO L93 Difference]: Finished difference Result 2354 states and 4685 transitions. [2022-01-18 16:27:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 16:27:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:50,689 INFO L225 Difference]: With dead ends: 2354 [2022-01-18 16:27:50,689 INFO L226 Difference]: Without dead ends: 2116 [2022-01-18 16:27:50,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8108 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1851, Invalid=21405, Unknown=0, NotChecked=0, Total=23256 [2022-01-18 16:27:50,692 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 330 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 4583 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:50,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 892 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4583 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 16:27:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2022-01-18 16:27:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1497. [2022-01-18 16:27:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.016042780748663) internal successors, (3016), 1496 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3016 transitions. [2022-01-18 16:27:50,706 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3016 transitions. Word has length 33 [2022-01-18 16:27:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:50,706 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 3016 transitions. [2022-01-18 16:27:50,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3016 transitions. [2022-01-18 16:27:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:50,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:50,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:50,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:50,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 16:27:50,918 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1839528648, now seen corresponding path program 200 times [2022-01-18 16:27:50,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:50,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566836968] [2022-01-18 16:27:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:50,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:51,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:51,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566836968] [2022-01-18 16:27:51,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566836968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:51,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704441218] [2022-01-18 16:27:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:51,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:51,175 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 16:27:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:51,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:51,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:27:51,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:51,480 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:27:51,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:27:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:51,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:52,010 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:52,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:27:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:52,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704441218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:52,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:52,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:27:52,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707706455] [2022-01-18 16:27:52,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:27:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:27:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:27:52,071 INFO L87 Difference]: Start difference. First operand 1497 states and 3016 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:56,790 INFO L93 Difference]: Finished difference Result 2398 states and 4752 transitions. [2022-01-18 16:27:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-18 16:27:56,790 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:56,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:56,792 INFO L225 Difference]: With dead ends: 2398 [2022-01-18 16:27:56,793 INFO L226 Difference]: Without dead ends: 2229 [2022-01-18 16:27:56,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8433 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2184, Invalid=21686, Unknown=0, NotChecked=0, Total=23870 [2022-01-18 16:27:56,795 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 385 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 3523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:56,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 735 Invalid, 3523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:27:56,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2022-01-18 16:27:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1528. [2022-01-18 16:27:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.0104780615586115) internal successors, (3070), 1527 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3070 transitions. [2022-01-18 16:27:56,819 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3070 transitions. Word has length 33 [2022-01-18 16:27:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:56,819 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 3070 transitions. [2022-01-18 16:27:56,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3070 transitions. [2022-01-18 16:27:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:56,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:56,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:56,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:57,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 16:27:57,035 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:27:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -413286282, now seen corresponding path program 201 times [2022-01-18 16:27:57,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638739120] [2022-01-18 16:27:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:57,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:57,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638739120] [2022-01-18 16:27:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638739120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:57,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988599883] [2022-01-18 16:27:57,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:57,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:57,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:57,288 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:27:57,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 16:27:57,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:27:57,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:57,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:27:57,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:57,578 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:57,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:27:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:57,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:58,175 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:27:58,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 65 [2022-01-18 16:27:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:58,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988599883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:58,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:58,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:27:58,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096389962] [2022-01-18 16:27:58,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:58,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:27:58,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:58,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:27:58,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:27:58,233 INFO L87 Difference]: Start difference. First operand 1528 states and 3070 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:28:04,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:04,639 INFO L93 Difference]: Finished difference Result 2463 states and 4846 transitions. [2022-01-18 16:28:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-18 16:28:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:04,642 INFO L225 Difference]: With dead ends: 2463 [2022-01-18 16:28:04,642 INFO L226 Difference]: Without dead ends: 2365 [2022-01-18 16:28:04,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10357 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2695, Invalid=26717, Unknown=0, NotChecked=0, Total=29412 [2022-01-18 16:28:04,644 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 404 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 4896 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 4896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:04,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 925 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 4896 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-18 16:28:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2022-01-18 16:28:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1484. [2022-01-18 16:28:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0053944706675657) internal successors, (2974), 1483 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2974 transitions. [2022-01-18 16:28:04,666 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2974 transitions. Word has length 33 [2022-01-18 16:28:04,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:04,666 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2974 transitions. [2022-01-18 16:28:04,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:28:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2974 transitions. [2022-01-18 16:28:04,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:04,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:04,667 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:04,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:04,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:04,882 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1327919028, now seen corresponding path program 202 times [2022-01-18 16:28:04,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:04,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436510090] [2022-01-18 16:28:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:04,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:05,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436510090] [2022-01-18 16:28:05,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436510090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520252484] [2022-01-18 16:28:05,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:05,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:05,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:05,088 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:05,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 16:28:05,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:05,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:05,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:05,353 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:05,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:05,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:05,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:05,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:28:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:06,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520252484] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:06,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:06,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:06,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605541116] [2022-01-18 16:28:06,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:06,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:06,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:06,029 INFO L87 Difference]: Start difference. First operand 1484 states and 2974 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:09,505 INFO L93 Difference]: Finished difference Result 2449 states and 4853 transitions. [2022-01-18 16:28:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-18 16:28:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:09,507 INFO L225 Difference]: With dead ends: 2449 [2022-01-18 16:28:09,508 INFO L226 Difference]: Without dead ends: 2365 [2022-01-18 16:28:09,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5741 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1624, Invalid=16466, Unknown=0, NotChecked=0, Total=18090 [2022-01-18 16:28:09,509 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 291 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:09,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 492 Invalid, 3420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:28:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2022-01-18 16:28:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1775. [2022-01-18 16:28:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 2.0) internal successors, (3548), 1774 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 3548 transitions. [2022-01-18 16:28:09,525 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 3548 transitions. Word has length 33 [2022-01-18 16:28:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:09,525 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 3548 transitions. [2022-01-18 16:28:09,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 3548 transitions. [2022-01-18 16:28:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:09,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:09,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:09,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:09,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-01-18 16:28:09,736 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 714110926, now seen corresponding path program 203 times [2022-01-18 16:28:09,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:09,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554803146] [2022-01-18 16:28:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:09,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:09,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554803146] [2022-01-18 16:28:09,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554803146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:09,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818785578] [2022-01-18 16:28:09,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:28:09,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:09,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:10,000 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:10,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 16:28:10,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:28:10,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:28:10,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:10,384 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:10,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:10,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:10,947 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:10,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:28:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:11,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818785578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:11,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:11,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:11,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33190280] [2022-01-18 16:28:11,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:11,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:11,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:11,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1540, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:11,013 INFO L87 Difference]: Start difference. First operand 1775 states and 3548 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:13,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:13,031 INFO L93 Difference]: Finished difference Result 2349 states and 4652 transitions. [2022-01-18 16:28:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 16:28:13,031 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:13,033 INFO L225 Difference]: With dead ends: 2349 [2022-01-18 16:28:13,033 INFO L226 Difference]: Without dead ends: 2253 [2022-01-18 16:28:13,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=810, Invalid=8120, Unknown=0, NotChecked=0, Total=8930 [2022-01-18 16:28:13,034 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 242 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:13,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 473 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:28:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-01-18 16:28:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1825. [2022-01-18 16:28:13,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1824 states have (on average 1.9989035087719298) internal successors, (3646), 1824 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 3646 transitions. [2022-01-18 16:28:13,049 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 3646 transitions. Word has length 33 [2022-01-18 16:28:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:13,050 INFO L470 AbstractCegarLoop]: Abstraction has 1825 states and 3646 transitions. [2022-01-18 16:28:13,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:13,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 3646 transitions. [2022-01-18 16:28:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:13,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:13,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:13,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-01-18 16:28:13,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:13,266 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2099733516, now seen corresponding path program 204 times [2022-01-18 16:28:13,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:13,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894445134] [2022-01-18 16:28:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:13,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:13,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:13,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894445134] [2022-01-18 16:28:13,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894445134] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:13,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372164894] [2022-01-18 16:28:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:13,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:13,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:13,532 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:13,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 16:28:13,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:28:13,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:13,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:13,935 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:13,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:14,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:14,534 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:14,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2022-01-18 16:28:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:14,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372164894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:14,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:14,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:28:14,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353580879] [2022-01-18 16:28:14,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:14,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:28:14,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:14,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:28:14,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:28:14,597 INFO L87 Difference]: Start difference. First operand 1825 states and 3646 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:17,812 INFO L93 Difference]: Finished difference Result 2579 states and 5122 transitions. [2022-01-18 16:28:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 16:28:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:17,815 INFO L225 Difference]: With dead ends: 2579 [2022-01-18 16:28:17,815 INFO L226 Difference]: Without dead ends: 2491 [2022-01-18 16:28:17,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4621 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1204, Invalid=12602, Unknown=0, NotChecked=0, Total=13806 [2022-01-18 16:28:17,816 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 322 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 2637 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:17,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 487 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:28:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-01-18 16:28:17,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1829. [2022-01-18 16:28:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 1.99890590809628) internal successors, (3654), 1828 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 3654 transitions. [2022-01-18 16:28:17,833 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 3654 transitions. Word has length 33 [2022-01-18 16:28:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:17,834 INFO L470 AbstractCegarLoop]: Abstraction has 1829 states and 3654 transitions. [2022-01-18 16:28:17,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:17,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 3654 transitions. [2022-01-18 16:28:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:17,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:17,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:17,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 16:28:18,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-01-18 16:28:18,035 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1458622926, now seen corresponding path program 205 times [2022-01-18 16:28:18,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:18,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877413573] [2022-01-18 16:28:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:18,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:18,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:18,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877413573] [2022-01-18 16:28:18,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877413573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666858731] [2022-01-18 16:28:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:18,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:18,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:18,294 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:18,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 16:28:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:18,600 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:18,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:18,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:19,059 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:19,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:28:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:19,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666858731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:19,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:19,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:19,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138533649] [2022-01-18 16:28:19,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:19,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:19,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:19,106 INFO L87 Difference]: Start difference. First operand 1829 states and 3654 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:22,676 INFO L93 Difference]: Finished difference Result 2811 states and 5557 transitions. [2022-01-18 16:28:22,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-18 16:28:22,676 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:22,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:22,679 INFO L225 Difference]: With dead ends: 2811 [2022-01-18 16:28:22,679 INFO L226 Difference]: Without dead ends: 2672 [2022-01-18 16:28:22,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6457 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1809, Invalid=17097, Unknown=0, NotChecked=0, Total=18906 [2022-01-18 16:28:22,680 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 285 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:22,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 576 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:28:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2022-01-18 16:28:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1808. [2022-01-18 16:28:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 1.9988931931377976) internal successors, (3612), 1807 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3612 transitions. [2022-01-18 16:28:22,698 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3612 transitions. Word has length 33 [2022-01-18 16:28:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:22,698 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 3612 transitions. [2022-01-18 16:28:22,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3612 transitions. [2022-01-18 16:28:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:22,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:22,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:22,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 16:28:22,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 16:28:22,914 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:22,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:22,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1410102004, now seen corresponding path program 206 times [2022-01-18 16:28:22,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:22,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524725379] [2022-01-18 16:28:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:22,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:23,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:23,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524725379] [2022-01-18 16:28:23,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524725379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:23,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393100597] [2022-01-18 16:28:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:28:23,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:23,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:23,081 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:23,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 16:28:23,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:28:23,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:23,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:23,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:23,364 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:23,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:28:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:23,831 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:23,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:28:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:23,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393100597] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:23,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:23,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:23,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664675267] [2022-01-18 16:28:23,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:23,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:23,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:23,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:23,903 INFO L87 Difference]: Start difference. First operand 1808 states and 3612 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:28,346 INFO L93 Difference]: Finished difference Result 2932 states and 5778 transitions. [2022-01-18 16:28:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-18 16:28:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:28,349 INFO L225 Difference]: With dead ends: 2932 [2022-01-18 16:28:28,349 INFO L226 Difference]: Without dead ends: 2832 [2022-01-18 16:28:28,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7092 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2229, Invalid=18651, Unknown=0, NotChecked=0, Total=20880 [2022-01-18 16:28:28,350 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 388 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 4092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:28,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 621 Invalid, 4092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 16:28:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-01-18 16:28:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1798. [2022-01-18 16:28:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.9988870339454647) internal successors, (3592), 1797 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:28,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3592 transitions. [2022-01-18 16:28:28,368 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3592 transitions. Word has length 33 [2022-01-18 16:28:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:28,368 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3592 transitions. [2022-01-18 16:28:28,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:28,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3592 transitions. [2022-01-18 16:28:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:28,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:28,370 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:28,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:28,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 16:28:28,583 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:28,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:28,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1970232546, now seen corresponding path program 207 times [2022-01-18 16:28:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970752376] [2022-01-18 16:28:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:28,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:28,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970752376] [2022-01-18 16:28:28,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970752376] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:28,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222210125] [2022-01-18 16:28:28,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:28:28,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:28,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:28,836 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 16:28:28,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:28:28,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:28:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:29,030 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:29,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:29,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:29,702 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:29,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 65 [2022-01-18 16:28:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:29,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222210125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:29,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:29,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:28:29,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056565729] [2022-01-18 16:28:29,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:29,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:28:29,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:28:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:28:29,769 INFO L87 Difference]: Start difference. First operand 1798 states and 3592 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:28:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:33,268 INFO L93 Difference]: Finished difference Result 2540 states and 4993 transitions. [2022-01-18 16:28:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 16:28:33,269 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:33,271 INFO L225 Difference]: With dead ends: 2540 [2022-01-18 16:28:33,271 INFO L226 Difference]: Without dead ends: 2407 [2022-01-18 16:28:33,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5196 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1582, Invalid=14420, Unknown=0, NotChecked=0, Total=16002 [2022-01-18 16:28:33,273 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 397 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:33,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 513 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:28:33,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-01-18 16:28:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1798. [2022-01-18 16:28:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.9988870339454647) internal successors, (3592), 1797 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3592 transitions. [2022-01-18 16:28:33,289 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3592 transitions. Word has length 33 [2022-01-18 16:28:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3592 transitions. [2022-01-18 16:28:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:28:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3592 transitions. [2022-01-18 16:28:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:33,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:33,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:33,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:33,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 16:28:33,493 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1871799300, now seen corresponding path program 208 times [2022-01-18 16:28:33,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:33,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130850066] [2022-01-18 16:28:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:33,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:33,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130850066] [2022-01-18 16:28:33,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130850066] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:33,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354143005] [2022-01-18 16:28:33,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:33,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:33,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:33,772 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:33,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 16:28:33,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:33,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:33,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:33,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:34,136 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:34,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:28:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:34,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:34,476 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:34,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:28:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:34,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354143005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:34,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:34,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 16:28:34,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058271291] [2022-01-18 16:28:34,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:34,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:28:34,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:28:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:28:34,514 INFO L87 Difference]: Start difference. First operand 1798 states and 3592 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:36,216 INFO L93 Difference]: Finished difference Result 2456 states and 4865 transitions. [2022-01-18 16:28:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:28:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:36,218 INFO L225 Difference]: With dead ends: 2456 [2022-01-18 16:28:36,218 INFO L226 Difference]: Without dead ends: 2372 [2022-01-18 16:28:36,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=758, Invalid=6552, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 16:28:36,218 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 224 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:36,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 449 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 16:28:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2022-01-18 16:28:36,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 1798. [2022-01-18 16:28:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.9988870339454647) internal successors, (3592), 1797 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3592 transitions. [2022-01-18 16:28:36,234 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3592 transitions. Word has length 33 [2022-01-18 16:28:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:36,234 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3592 transitions. [2022-01-18 16:28:36,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:36,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3592 transitions. [2022-01-18 16:28:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:36,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:36,236 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:36,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:36,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 16:28:36,451 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1851841214, now seen corresponding path program 209 times [2022-01-18 16:28:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531798664] [2022-01-18 16:28:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:36,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:36,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531798664] [2022-01-18 16:28:36,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531798664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354171288] [2022-01-18 16:28:36,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:28:36,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:36,734 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:36,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 16:28:36,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:28:36,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:37,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:37,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:37,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:37,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:37,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:37,973 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:28:37,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 55 [2022-01-18 16:28:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354171288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:38,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:38,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:28:38,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931806127] [2022-01-18 16:28:38,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:38,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:28:38,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:28:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:28:38,071 INFO L87 Difference]: Start difference. First operand 1798 states and 3592 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:40,099 INFO L93 Difference]: Finished difference Result 2189 states and 4324 transitions. [2022-01-18 16:28:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:28:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:40,102 INFO L225 Difference]: With dead ends: 2189 [2022-01-18 16:28:40,102 INFO L226 Difference]: Without dead ends: 2132 [2022-01-18 16:28:40,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2536 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=748, Invalid=7994, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 16:28:40,103 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 196 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:40,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 488 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1525 Invalid, 0 Unknown, 384 Unchecked, 0.6s Time] [2022-01-18 16:28:40,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-01-18 16:28:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1809. [2022-01-18 16:28:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 1.9955752212389382) internal successors, (3608), 1808 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 3608 transitions. [2022-01-18 16:28:40,118 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 3608 transitions. Word has length 33 [2022-01-18 16:28:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:40,118 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 3608 transitions. [2022-01-18 16:28:40,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 3608 transitions. [2022-01-18 16:28:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:40,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:40,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:40,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:40,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 16:28:40,334 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1582698328, now seen corresponding path program 210 times [2022-01-18 16:28:40,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:40,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765391017] [2022-01-18 16:28:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:40,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:40,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765391017] [2022-01-18 16:28:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765391017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:40,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216837230] [2022-01-18 16:28:40,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:40,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:40,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:40,647 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:40,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 16:28:40,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:28:40,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:40,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:28:40,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:41,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:41,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:41,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:41,674 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:41,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:41,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216837230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:41,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:41,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:41,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53095350] [2022-01-18 16:28:41,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:41,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:41,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:41,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:41,735 INFO L87 Difference]: Start difference. First operand 1809 states and 3608 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:28:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:43,114 INFO L93 Difference]: Finished difference Result 2178 states and 4288 transitions. [2022-01-18 16:28:43,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:28:43,114 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:28:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:43,116 INFO L225 Difference]: With dead ends: 2178 [2022-01-18 16:28:43,116 INFO L226 Difference]: Without dead ends: 2157 [2022-01-18 16:28:43,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=515, Invalid=5185, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:28:43,117 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:43,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 274 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1080 Invalid, 0 Unknown, 199 Unchecked, 0.4s Time] [2022-01-18 16:28:43,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-01-18 16:28:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1804. [2022-01-18 16:28:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 1.9955629506378258) internal successors, (3598), 1803 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 3598 transitions. [2022-01-18 16:28:43,132 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 3598 transitions. Word has length 33 [2022-01-18 16:28:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:43,132 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 3598 transitions. [2022-01-18 16:28:43,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:28:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 3598 transitions. [2022-01-18 16:28:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:43,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:43,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:43,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:43,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:43,346 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:43,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1685614312, now seen corresponding path program 211 times [2022-01-18 16:28:43,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497113589] [2022-01-18 16:28:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:43,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:43,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:43,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497113589] [2022-01-18 16:28:43,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497113589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:43,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122905874] [2022-01-18 16:28:43,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:43,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:43,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:43,539 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:43,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 16:28:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:43,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:28:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:44,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:44,417 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:44,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122905874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:44,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:44,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:28:44,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48812105] [2022-01-18 16:28:44,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:44,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:28:44,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:28:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:28:44,474 INFO L87 Difference]: Start difference. First operand 1804 states and 3598 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:28:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:45,958 INFO L93 Difference]: Finished difference Result 2286 states and 4540 transitions. [2022-01-18 16:28:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:28:45,958 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:28:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:45,960 INFO L225 Difference]: With dead ends: 2286 [2022-01-18 16:28:45,960 INFO L226 Difference]: Without dead ends: 2271 [2022-01-18 16:28:45,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=497, Invalid=5203, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 16:28:45,961 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:45,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 437 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1403 Invalid, 0 Unknown, 438 Unchecked, 0.5s Time] [2022-01-18 16:28:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-01-18 16:28:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1798. [2022-01-18 16:28:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.9972175848636617) internal successors, (3589), 1797 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3589 transitions. [2022-01-18 16:28:45,986 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3589 transitions. Word has length 33 [2022-01-18 16:28:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:45,986 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3589 transitions. [2022-01-18 16:28:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:28:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3589 transitions. [2022-01-18 16:28:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:45,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:45,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:46,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:46,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:46,191 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:46,192 INFO L85 PathProgramCache]: Analyzing trace with hash 719104856, now seen corresponding path program 212 times [2022-01-18 16:28:46,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:46,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439726577] [2022-01-18 16:28:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:46,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:46,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:46,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439726577] [2022-01-18 16:28:46,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439726577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:46,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954579152] [2022-01-18 16:28:46,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:28:46,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:46,459 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:46,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 16:28:46,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:28:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:46,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:28:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:47,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:47,441 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:47,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:47,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954579152] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:47,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:47,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:28:47,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565588900] [2022-01-18 16:28:47,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:47,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:28:47,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:28:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:28:47,497 INFO L87 Difference]: Start difference. First operand 1798 states and 3589 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:48,784 INFO L93 Difference]: Finished difference Result 2464 states and 4875 transitions. [2022-01-18 16:28:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:28:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:48,787 INFO L225 Difference]: With dead ends: 2464 [2022-01-18 16:28:48,787 INFO L226 Difference]: Without dead ends: 2424 [2022-01-18 16:28:48,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=422, Invalid=4690, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:28:48,788 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 215 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:48,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 553 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1302 Invalid, 0 Unknown, 317 Unchecked, 0.5s Time] [2022-01-18 16:28:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-01-18 16:28:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1784. [2022-01-18 16:28:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.9966348850252384) internal successors, (3560), 1783 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3560 transitions. [2022-01-18 16:28:48,804 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3560 transitions. Word has length 33 [2022-01-18 16:28:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:48,804 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 3560 transitions. [2022-01-18 16:28:48,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3560 transitions. [2022-01-18 16:28:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:48,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:48,806 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:48,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:49,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 16:28:49,013 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 318400796, now seen corresponding path program 213 times [2022-01-18 16:28:49,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618963331] [2022-01-18 16:28:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:49,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:49,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:49,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618963331] [2022-01-18 16:28:49,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618963331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:49,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735005260] [2022-01-18 16:28:49,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:28:49,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:49,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:49,279 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:49,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 16:28:49,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:28:49,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:49,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:28:49,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:49,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:49,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:49,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:50,260 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:50,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:50,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735005260] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:50,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:50,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:28:50,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73891716] [2022-01-18 16:28:50,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:50,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:28:50,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:28:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:28:50,319 INFO L87 Difference]: Start difference. First operand 1784 states and 3560 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:51,416 INFO L93 Difference]: Finished difference Result 2683 states and 5306 transitions. [2022-01-18 16:28:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:28:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:51,419 INFO L225 Difference]: With dead ends: 2683 [2022-01-18 16:28:51,419 INFO L226 Difference]: Without dead ends: 2638 [2022-01-18 16:28:51,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=402, Invalid=4568, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 16:28:51,419 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 181 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:51,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 616 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1397 Invalid, 0 Unknown, 269 Unchecked, 0.4s Time] [2022-01-18 16:28:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-01-18 16:28:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 1780. [2022-01-18 16:28:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.9966273187183812) internal successors, (3552), 1779 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3552 transitions. [2022-01-18 16:28:51,436 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3552 transitions. Word has length 33 [2022-01-18 16:28:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:51,436 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3552 transitions. [2022-01-18 16:28:51,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:51,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3552 transitions. [2022-01-18 16:28:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:51,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:51,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:51,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:51,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:51,652 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash -246881858, now seen corresponding path program 214 times [2022-01-18 16:28:51,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:51,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589728126] [2022-01-18 16:28:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:51,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:51,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589728126] [2022-01-18 16:28:51,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589728126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:51,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493052614] [2022-01-18 16:28:51,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:51,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:51,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:51,829 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:51,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 16:28:51,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:51,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:52,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:52,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:28:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:52,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:52,553 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:52,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:52,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493052614] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:52,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:52,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:28:52,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062027711] [2022-01-18 16:28:52,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:52,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:28:52,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:28:52,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:28:52,591 INFO L87 Difference]: Start difference. First operand 1780 states and 3552 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:53,646 INFO L93 Difference]: Finished difference Result 2734 states and 5418 transitions. [2022-01-18 16:28:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:28:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:53,650 INFO L225 Difference]: With dead ends: 2734 [2022-01-18 16:28:53,650 INFO L226 Difference]: Without dead ends: 2693 [2022-01-18 16:28:53,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=455, Invalid=5095, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:28:53,650 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 190 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 671 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:53,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 574 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1275 Invalid, 0 Unknown, 671 Unchecked, 0.4s Time] [2022-01-18 16:28:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-01-18 16:28:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1772. [2022-01-18 16:28:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.9954827780914737) internal successors, (3534), 1771 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 3534 transitions. [2022-01-18 16:28:53,670 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 3534 transitions. Word has length 33 [2022-01-18 16:28:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:53,670 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 3534 transitions. [2022-01-18 16:28:53,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:28:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 3534 transitions. [2022-01-18 16:28:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:53,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:53,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:53,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 16:28:53,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-01-18 16:28:53,887 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1598834098, now seen corresponding path program 215 times [2022-01-18 16:28:53,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766886344] [2022-01-18 16:28:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:53,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:54,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766886344] [2022-01-18 16:28:54,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766886344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:54,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132243251] [2022-01-18 16:28:54,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:28:54,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:54,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:54,149 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:54,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 16:28:54,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:28:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:54,442 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:28:54,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:28:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:54,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:54,974 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:54,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132243251] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:55,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:55,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-01-18 16:28:55,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692302682] [2022-01-18 16:28:55,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:55,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:28:55,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:55,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:28:55,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:28:55,025 INFO L87 Difference]: Start difference. First operand 1772 states and 3534 transitions. Second operand has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:56,210 INFO L93 Difference]: Finished difference Result 2428 states and 4776 transitions. [2022-01-18 16:28:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:28:56,210 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:56,213 INFO L225 Difference]: With dead ends: 2428 [2022-01-18 16:28:56,213 INFO L226 Difference]: Without dead ends: 2380 [2022-01-18 16:28:56,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=4031, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:28:56,213 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 257 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:56,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 538 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1392 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-01-18 16:28:56,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-01-18 16:28:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1773. [2022-01-18 16:28:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 1.9960496613995484) internal successors, (3537), 1772 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 3537 transitions. [2022-01-18 16:28:56,229 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 3537 transitions. Word has length 33 [2022-01-18 16:28:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 3537 transitions. [2022-01-18 16:28:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 3537 transitions. [2022-01-18 16:28:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:56,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:56,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:56,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-01-18 16:28:56,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:56,431 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -835515764, now seen corresponding path program 216 times [2022-01-18 16:28:56,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:56,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392483216] [2022-01-18 16:28:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:56,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:56,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:56,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392483216] [2022-01-18 16:28:56,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392483216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:56,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953654766] [2022-01-18 16:28:56,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:28:56,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:56,694 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:56,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 16:28:56,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:28:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:56,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:28:56,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:57,023 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:57,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:28:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:57,577 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:28:57,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:28:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953654766] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:28:57,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:28:57,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:28:57,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045564854] [2022-01-18 16:28:57,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:28:57,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:28:57,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:28:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:28:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:28:57,632 INFO L87 Difference]: Start difference. First operand 1773 states and 3537 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:28:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:28:59,411 INFO L93 Difference]: Finished difference Result 2709 states and 5344 transitions. [2022-01-18 16:28:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-18 16:28:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:28:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:28:59,413 INFO L225 Difference]: With dead ends: 2709 [2022-01-18 16:28:59,414 INFO L226 Difference]: Without dead ends: 2661 [2022-01-18 16:28:59,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=632, Invalid=6508, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 16:28:59,414 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 297 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:28:59,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 567 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1633 Invalid, 0 Unknown, 10 Unchecked, 0.6s Time] [2022-01-18 16:28:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2022-01-18 16:28:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1776. [2022-01-18 16:28:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.9977464788732395) internal successors, (3546), 1775 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:28:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3546 transitions. [2022-01-18 16:28:59,431 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3546 transitions. Word has length 33 [2022-01-18 16:28:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:28:59,431 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 3546 transitions. [2022-01-18 16:28:59,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:28:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3546 transitions. [2022-01-18 16:28:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:28:59,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:28:59,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:28:59,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 16:28:59,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 16:28:59,639 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:28:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:28:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash 443855950, now seen corresponding path program 217 times [2022-01-18 16:28:59,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:28:59,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835374717] [2022-01-18 16:28:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:28:59,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:28:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:59,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:59,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835374717] [2022-01-18 16:28:59,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835374717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:59,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407470989] [2022-01-18 16:28:59,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:28:59,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:59,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:59,903 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:28:59,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 16:28:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:28:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:00,234 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:00,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:00,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:00,640 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:00,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:00,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407470989] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:00,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:00,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:29:00,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114933415] [2022-01-18 16:29:00,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:00,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:00,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:00,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:00,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:00,674 INFO L87 Difference]: Start difference. First operand 1776 states and 3546 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:02,393 INFO L93 Difference]: Finished difference Result 2713 states and 5385 transitions. [2022-01-18 16:29:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:29:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:02,396 INFO L225 Difference]: With dead ends: 2713 [2022-01-18 16:29:02,396 INFO L226 Difference]: Without dead ends: 2665 [2022-01-18 16:29:02,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=553, Invalid=5767, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:29:02,397 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 302 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:02,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 653 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1936 Invalid, 0 Unknown, 10 Unchecked, 0.7s Time] [2022-01-18 16:29:02,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2022-01-18 16:29:02,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1777. [2022-01-18 16:29:02,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 1.9977477477477477) internal successors, (3548), 1776 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 3548 transitions. [2022-01-18 16:29:02,414 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 3548 transitions. Word has length 33 [2022-01-18 16:29:02,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:02,414 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 3548 transitions. [2022-01-18 16:29:02,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 3548 transitions. [2022-01-18 16:29:02,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:02,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:02,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:02,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:02,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-01-18 16:29:02,630 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1829478540, now seen corresponding path program 218 times [2022-01-18 16:29:02,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:02,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000604830] [2022-01-18 16:29:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:02,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:02,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000604830] [2022-01-18 16:29:02,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000604830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:02,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654440277] [2022-01-18 16:29:02,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:02,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:02,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:02,900 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 16:29:02,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:03,243 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:03,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:03,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:03,685 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:03,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:03,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654440277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:03,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:03,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:29:03,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984571927] [2022-01-18 16:29:03,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:03,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:03,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:03,758 INFO L87 Difference]: Start difference. First operand 1777 states and 3548 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:06,067 INFO L93 Difference]: Finished difference Result 2977 states and 5902 transitions. [2022-01-18 16:29:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:29:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:06,070 INFO L225 Difference]: With dead ends: 2977 [2022-01-18 16:29:06,070 INFO L226 Difference]: Without dead ends: 2925 [2022-01-18 16:29:06,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=749, Invalid=7083, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:29:06,070 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 353 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:06,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 612 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2252 Invalid, 0 Unknown, 18 Unchecked, 0.8s Time] [2022-01-18 16:29:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2022-01-18 16:29:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 1777. [2022-01-18 16:29:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 1.9977477477477477) internal successors, (3548), 1776 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 3548 transitions. [2022-01-18 16:29:06,089 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 3548 transitions. Word has length 33 [2022-01-18 16:29:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:06,089 INFO L470 AbstractCegarLoop]: Abstraction has 1777 states and 3548 transitions. [2022-01-18 16:29:06,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 3548 transitions. [2022-01-18 16:29:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:06,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:06,090 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:06,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 16:29:06,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 16:29:06,293 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1188367950, now seen corresponding path program 219 times [2022-01-18 16:29:06,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274663467] [2022-01-18 16:29:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:06,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:06,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274663467] [2022-01-18 16:29:06,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274663467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:06,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984819113] [2022-01-18 16:29:06,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:29:06,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:06,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:06,486 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:06,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 16:29:06,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:29:06,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:06,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:06,689 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:06,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:06,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:07,214 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:07,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:07,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984819113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:07,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:07,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:29:07,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006697881] [2022-01-18 16:29:07,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:07,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:07,268 INFO L87 Difference]: Start difference. First operand 1777 states and 3548 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:09,947 INFO L93 Difference]: Finished difference Result 3226 states and 6359 transitions. [2022-01-18 16:29:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-18 16:29:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:09,951 INFO L225 Difference]: With dead ends: 3226 [2022-01-18 16:29:09,951 INFO L226 Difference]: Without dead ends: 3178 [2022-01-18 16:29:09,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3416 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1172, Invalid=10170, Unknown=0, NotChecked=0, Total=11342 [2022-01-18 16:29:09,953 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 447 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:09,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 597 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2363 Invalid, 0 Unknown, 21 Unchecked, 0.8s Time] [2022-01-18 16:29:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3178 states. [2022-01-18 16:29:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3178 to 1782. [2022-01-18 16:29:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.9983155530600787) internal successors, (3559), 1781 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3559 transitions. [2022-01-18 16:29:09,981 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3559 transitions. Word has length 33 [2022-01-18 16:29:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:09,981 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 3559 transitions. [2022-01-18 16:29:09,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3559 transitions. [2022-01-18 16:29:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:09,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:09,982 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:10,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:10,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 16:29:10,192 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1680356980, now seen corresponding path program 220 times [2022-01-18 16:29:10,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450674512] [2022-01-18 16:29:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:10,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:10,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450674512] [2022-01-18 16:29:10,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450674512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299779776] [2022-01-18 16:29:10,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:29:10,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:10,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:10,471 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:10,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 16:29:10,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:29:10,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:10,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:10,744 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:10,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:11,324 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:11,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:11,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299779776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:11,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:11,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:29:11,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992566915] [2022-01-18 16:29:11,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:11,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:29:11,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:11,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:29:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:29:11,357 INFO L87 Difference]: Start difference. First operand 1782 states and 3559 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:15,250 INFO L93 Difference]: Finished difference Result 3158 states and 6225 transitions. [2022-01-18 16:29:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 16:29:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:15,253 INFO L225 Difference]: With dead ends: 3158 [2022-01-18 16:29:15,253 INFO L226 Difference]: Without dead ends: 3118 [2022-01-18 16:29:15,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4739 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1662, Invalid=13344, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:29:15,255 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 563 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:15,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 641 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2638 Invalid, 0 Unknown, 24 Unchecked, 0.9s Time] [2022-01-18 16:29:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2022-01-18 16:29:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1782. [2022-01-18 16:29:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.9966311061201572) internal successors, (3556), 1781 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3556 transitions. [2022-01-18 16:29:15,273 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3556 transitions. Word has length 33 [2022-01-18 16:29:15,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:15,273 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 3556 transitions. [2022-01-18 16:29:15,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 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) [2022-01-18 16:29:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3556 transitions. [2022-01-18 16:29:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:15,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:15,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:15,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:15,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:15,490 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 835909064, now seen corresponding path program 221 times [2022-01-18 16:29:15,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554661174] [2022-01-18 16:29:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:15,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:15,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554661174] [2022-01-18 16:29:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554661174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:15,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492179204] [2022-01-18 16:29:15,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:15,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:15,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:15,762 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:15,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 16:29:15,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:29:15,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:29:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:16,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:16,742 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:16,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492179204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:16,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:16,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:16,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116017564] [2022-01-18 16:29:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:16,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:16,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:16,805 INFO L87 Difference]: Start difference. First operand 1782 states and 3556 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:18,269 INFO L93 Difference]: Finished difference Result 2868 states and 5640 transitions. [2022-01-18 16:29:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 16:29:18,269 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:18,271 INFO L225 Difference]: With dead ends: 2868 [2022-01-18 16:29:18,271 INFO L226 Difference]: Without dead ends: 2783 [2022-01-18 16:29:18,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 13 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=5092, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:29:18,272 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 266 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:18,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 652 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1422 Invalid, 0 Unknown, 528 Unchecked, 0.5s Time] [2022-01-18 16:29:18,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2022-01-18 16:29:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1791. [2022-01-18 16:29:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 1.9977653631284915) internal successors, (3576), 1790 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 3576 transitions. [2022-01-18 16:29:18,290 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 3576 transitions. Word has length 33 [2022-01-18 16:29:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 1791 states and 3576 transitions. [2022-01-18 16:29:18,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 3576 transitions. [2022-01-18 16:29:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:18,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:18,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:18,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 16:29:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:18,506 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1980893944, now seen corresponding path program 222 times [2022-01-18 16:29:18,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:18,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123362188] [2022-01-18 16:29:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:18,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:18,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:18,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123362188] [2022-01-18 16:29:18,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123362188] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384788557] [2022-01-18 16:29:18,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:18,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:18,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:18,775 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:18,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 16:29:18,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:29:18,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:29:18,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:19,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:19,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:19,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:19,771 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:19,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:19,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384788557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:19,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:19,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:19,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197131433] [2022-01-18 16:29:19,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:19,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:19,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:19,829 INFO L87 Difference]: Start difference. First operand 1791 states and 3576 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:21,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:21,185 INFO L93 Difference]: Finished difference Result 2438 states and 4807 transitions. [2022-01-18 16:29:21,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 16:29:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:21,188 INFO L225 Difference]: With dead ends: 2438 [2022-01-18 16:29:21,188 INFO L226 Difference]: Without dead ends: 2385 [2022-01-18 16:29:21,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=433, Invalid=4823, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 16:29:21,189 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 230 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:21,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 610 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1246 Invalid, 0 Unknown, 601 Unchecked, 0.5s Time] [2022-01-18 16:29:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-01-18 16:29:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1785. [2022-01-18 16:29:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 1.9983183856502242) internal successors, (3565), 1784 states have internal predecessors, (3565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3565 transitions. [2022-01-18 16:29:21,205 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3565 transitions. Word has length 33 [2022-01-18 16:29:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:21,205 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 3565 transitions. [2022-01-18 16:29:21,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3565 transitions. [2022-01-18 16:29:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:21,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:21,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:21,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:21,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 16:29:21,409 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:21,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2115280778, now seen corresponding path program 223 times [2022-01-18 16:29:21,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:21,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556766713] [2022-01-18 16:29:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:21,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:21,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556766713] [2022-01-18 16:29:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556766713] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:21,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395921095] [2022-01-18 16:29:21,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:21,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:21,697 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:21,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 16:29:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:22,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:22,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:22,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:22,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:22,475 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:22,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:22,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395921095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:22,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:22,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:22,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488659752] [2022-01-18 16:29:22,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:22,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:22,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:22,508 INFO L87 Difference]: Start difference. First operand 1785 states and 3565 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:23,580 INFO L93 Difference]: Finished difference Result 2362 states and 4691 transitions. [2022-01-18 16:29:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 16:29:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:23,583 INFO L225 Difference]: With dead ends: 2362 [2022-01-18 16:29:23,583 INFO L226 Difference]: Without dead ends: 2325 [2022-01-18 16:29:23,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:29:23,583 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 186 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:23,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 651 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1389 Invalid, 0 Unknown, 219 Unchecked, 0.4s Time] [2022-01-18 16:29:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-01-18 16:29:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1795. [2022-01-18 16:29:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 1.9972129319955407) internal successors, (3583), 1794 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 3583 transitions. [2022-01-18 16:29:23,601 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 3583 transitions. Word has length 33 [2022-01-18 16:29:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:23,601 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 3583 transitions. [2022-01-18 16:29:23,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 3583 transitions. [2022-01-18 16:29:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:23,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:23,603 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:23,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:23,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-01-18 16:29:23,814 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1338894806, now seen corresponding path program 224 times [2022-01-18 16:29:23,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:23,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130470893] [2022-01-18 16:29:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:23,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:24,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:24,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130470893] [2022-01-18 16:29:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130470893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097189037] [2022-01-18 16:29:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:24,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:24,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:24,089 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:24,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 16:29:24,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:24,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:24,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:24,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:24,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:25,095 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:25,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:25,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097189037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:25,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:25,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:25,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459996875] [2022-01-18 16:29:25,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:25,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:25,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:25,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:25,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:25,149 INFO L87 Difference]: Start difference. First operand 1795 states and 3583 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:26,411 INFO L93 Difference]: Finished difference Result 2381 states and 4729 transitions. [2022-01-18 16:29:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 16:29:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:26,413 INFO L225 Difference]: With dead ends: 2381 [2022-01-18 16:29:26,413 INFO L226 Difference]: Without dead ends: 2332 [2022-01-18 16:29:26,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=428, Invalid=4402, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:29:26,414 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:26,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 525 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1195 Invalid, 0 Unknown, 338 Unchecked, 0.5s Time] [2022-01-18 16:29:26,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-01-18 16:29:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1786. [2022-01-18 16:29:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 1.9983193277310924) internal successors, (3567), 1785 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3567 transitions. [2022-01-18 16:29:26,430 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3567 transitions. Word has length 33 [2022-01-18 16:29:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:26,430 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 3567 transitions. [2022-01-18 16:29:26,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3567 transitions. [2022-01-18 16:29:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:26,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:26,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:26,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:26,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:26,646 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash -794063928, now seen corresponding path program 225 times [2022-01-18 16:29:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:26,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180699006] [2022-01-18 16:29:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:26,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:26,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:26,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180699006] [2022-01-18 16:29:26,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180699006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:26,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571970083] [2022-01-18 16:29:26,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:29:26,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:26,903 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:26,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 16:29:26,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:29:26,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:27,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:27,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:27,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:27,928 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:27,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:27,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571970083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:27,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:27,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487183611] [2022-01-18 16:29:27,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:27,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:27,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:27,979 INFO L87 Difference]: Start difference. First operand 1786 states and 3567 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:29,433 INFO L93 Difference]: Finished difference Result 2650 states and 5236 transitions. [2022-01-18 16:29:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 16:29:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:29,436 INFO L225 Difference]: With dead ends: 2650 [2022-01-18 16:29:29,436 INFO L226 Difference]: Without dead ends: 2633 [2022-01-18 16:29:29,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=567, Invalid=5753, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 16:29:29,437 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 221 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:29,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 665 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1120 Invalid, 0 Unknown, 793 Unchecked, 0.4s Time] [2022-01-18 16:29:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2022-01-18 16:29:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1814. [2022-01-18 16:29:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 1.9961389961389961) internal successors, (3619), 1813 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 3619 transitions. [2022-01-18 16:29:29,453 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 3619 transitions. Word has length 33 [2022-01-18 16:29:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:29,454 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 3619 transitions. [2022-01-18 16:29:29,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 3619 transitions. [2022-01-18 16:29:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:29,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:29,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:29,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:29,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:29,670 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:29,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1063206814, now seen corresponding path program 226 times [2022-01-18 16:29:29,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:29,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151282300] [2022-01-18 16:29:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:29,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:29,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151282300] [2022-01-18 16:29:29,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151282300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013628755] [2022-01-18 16:29:29,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:29:29,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:29,940 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:29,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 16:29:29,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:29:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:30,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:30,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:30,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:30,821 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:30,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:30,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013628755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:30,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:30,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:30,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518601819] [2022-01-18 16:29:30,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:30,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:30,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:30,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:30,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:30,865 INFO L87 Difference]: Start difference. First operand 1814 states and 3619 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:32,999 INFO L93 Difference]: Finished difference Result 2734 states and 5426 transitions. [2022-01-18 16:29:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:29:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:33,002 INFO L225 Difference]: With dead ends: 2734 [2022-01-18 16:29:33,002 INFO L226 Difference]: Without dead ends: 2693 [2022-01-18 16:29:33,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=690, Invalid=6966, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:29:33,002 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 220 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1136 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:33,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 765 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1566 Invalid, 0 Unknown, 1136 Unchecked, 0.6s Time] [2022-01-18 16:29:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2022-01-18 16:29:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 1787. [2022-01-18 16:29:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 1.998320268756999) internal successors, (3569), 1786 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 3569 transitions. [2022-01-18 16:29:33,019 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 3569 transitions. Word has length 33 [2022-01-18 16:29:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:33,019 INFO L470 AbstractCegarLoop]: Abstraction has 1787 states and 3569 transitions. [2022-01-18 16:29:33,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 3569 transitions. [2022-01-18 16:29:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:33,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:33,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:33,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-01-18 16:29:33,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:33,224 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2084255818, now seen corresponding path program 227 times [2022-01-18 16:29:33,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:33,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108687216] [2022-01-18 16:29:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:33,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:33,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108687216] [2022-01-18 16:29:33,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108687216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:33,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564275199] [2022-01-18 16:29:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:33,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:33,518 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:33,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 16:29:33,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:29:33,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:33,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:33,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:33,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:34,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:34,658 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:34,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-01-18 16:29:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:34,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564275199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:34,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:34,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-01-18 16:29:34,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022360445] [2022-01-18 16:29:34,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:34,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 16:29:34,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 16:29:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:29:34,705 INFO L87 Difference]: Start difference. First operand 1787 states and 3569 transitions. Second operand has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:37,254 INFO L93 Difference]: Finished difference Result 2848 states and 5645 transitions. [2022-01-18 16:29:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 16:29:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:37,257 INFO L225 Difference]: With dead ends: 2848 [2022-01-18 16:29:37,257 INFO L226 Difference]: Without dead ends: 2808 [2022-01-18 16:29:37,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=878, Invalid=9424, Unknown=0, NotChecked=0, Total=10302 [2022-01-18 16:29:37,259 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 271 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:37,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 607 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1966 Invalid, 0 Unknown, 225 Unchecked, 0.7s Time] [2022-01-18 16:29:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2022-01-18 16:29:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1786. [2022-01-18 16:29:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 1.9983193277310924) internal successors, (3567), 1785 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3567 transitions. [2022-01-18 16:29:37,277 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3567 transitions. Word has length 33 [2022-01-18 16:29:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:37,277 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 3567 transitions. [2022-01-18 16:29:37,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 44 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3567 transitions. [2022-01-18 16:29:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:37,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:37,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:37,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 16:29:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-01-18 16:29:37,484 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1435174518, now seen corresponding path program 228 times [2022-01-18 16:29:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834556199] [2022-01-18 16:29:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:37,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:37,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834556199] [2022-01-18 16:29:37,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834556199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940032708] [2022-01-18 16:29:37,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:37,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:37,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:37,747 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:37,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 16:29:37,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:29:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:29:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:38,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:38,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:38,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:38,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:38,721 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:38,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:38,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940032708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:38,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:38,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:38,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759831809] [2022-01-18 16:29:38,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:38,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:38,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:38,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:38,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:38,770 INFO L87 Difference]: Start difference. First operand 1786 states and 3567 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:41,353 INFO L93 Difference]: Finished difference Result 2665 states and 5292 transitions. [2022-01-18 16:29:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 16:29:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:41,356 INFO L225 Difference]: With dead ends: 2665 [2022-01-18 16:29:41,356 INFO L226 Difference]: Without dead ends: 2633 [2022-01-18 16:29:41,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=997, Invalid=8509, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 16:29:41,357 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 294 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 552 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:41,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 586 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1597 Invalid, 0 Unknown, 552 Unchecked, 0.6s Time] [2022-01-18 16:29:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2022-01-18 16:29:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1786. [2022-01-18 16:29:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 1.9983193277310924) internal successors, (3567), 1785 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3567 transitions. [2022-01-18 16:29:41,373 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3567 transitions. Word has length 33 [2022-01-18 16:29:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 3567 transitions. [2022-01-18 16:29:41,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3567 transitions. [2022-01-18 16:29:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:41,375 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:41,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:41,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 16:29:41,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 16:29:41,575 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash -8932152, now seen corresponding path program 229 times [2022-01-18 16:29:41,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:41,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983403522] [2022-01-18 16:29:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:41,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983403522] [2022-01-18 16:29:41,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983403522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974647209] [2022-01-18 16:29:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:41,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:41,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:41,837 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:41,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 16:29:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:42,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:42,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:42,808 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:42,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974647209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:42,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:42,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:42,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020954359] [2022-01-18 16:29:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:42,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:42,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:42,858 INFO L87 Difference]: Start difference. First operand 1786 states and 3567 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:46,187 INFO L93 Difference]: Finished difference Result 2986 states and 5900 transitions. [2022-01-18 16:29:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 16:29:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:46,190 INFO L225 Difference]: With dead ends: 2986 [2022-01-18 16:29:46,190 INFO L226 Difference]: Without dead ends: 2958 [2022-01-18 16:29:46,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 46 SyntacticMatches, 25 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4732 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1351, Invalid=11081, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 16:29:46,190 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 301 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 689 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 723 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1671 Invalid, 0 Unknown, 689 Unchecked, 0.6s Time] [2022-01-18 16:29:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2022-01-18 16:29:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 1782. [2022-01-18 16:29:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 1.9966311061201572) internal successors, (3556), 1781 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 3556 transitions. [2022-01-18 16:29:46,208 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 3556 transitions. Word has length 33 [2022-01-18 16:29:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:46,209 INFO L470 AbstractCegarLoop]: Abstraction has 1782 states and 3556 transitions. [2022-01-18 16:29:46,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 3556 transitions. [2022-01-18 16:29:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:46,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:46,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:46,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:46,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:46,427 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1902769484, now seen corresponding path program 230 times [2022-01-18 16:29:46,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:46,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434680993] [2022-01-18 16:29:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:46,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:46,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434680993] [2022-01-18 16:29:46,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434680993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004143409] [2022-01-18 16:29:46,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:46,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:46,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:46,721 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:46,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 16:29:46,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:46,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:46,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:46,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:47,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:47,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:47,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:47,795 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:47,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:47,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004143409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:47,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:47,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:47,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926190298] [2022-01-18 16:29:47,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:47,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:47,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:47,837 INFO L87 Difference]: Start difference. First operand 1782 states and 3556 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:48,409 INFO L93 Difference]: Finished difference Result 2074 states and 4112 transitions. [2022-01-18 16:29:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 16:29:48,410 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:48,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:48,412 INFO L225 Difference]: With dead ends: 2074 [2022-01-18 16:29:48,412 INFO L226 Difference]: Without dead ends: 2041 [2022-01-18 16:29:48,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=2406, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 16:29:48,412 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:48,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 434 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 747 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-01-18 16:29:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2022-01-18 16:29:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1797. [2022-01-18 16:29:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 1.9944320712694878) internal successors, (3582), 1796 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 3582 transitions. [2022-01-18 16:29:48,427 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 3582 transitions. Word has length 33 [2022-01-18 16:29:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:48,427 INFO L470 AbstractCegarLoop]: Abstraction has 1797 states and 3582 transitions. [2022-01-18 16:29:48,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 3582 transitions. [2022-01-18 16:29:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:48,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:48,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:48,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:48,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 16:29:48,643 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:48,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1615811840, now seen corresponding path program 231 times [2022-01-18 16:29:48,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:48,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980626439] [2022-01-18 16:29:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:48,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:48,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:48,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980626439] [2022-01-18 16:29:48,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980626439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906184701] [2022-01-18 16:29:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:29:48,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:48,898 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:48,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 16:29:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:29:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:49,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:49,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:49,862 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:49,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:49,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906184701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:49,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:49,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:49,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618467615] [2022-01-18 16:29:49,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:49,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:49,904 INFO L87 Difference]: Start difference. First operand 1797 states and 3582 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:50,970 INFO L93 Difference]: Finished difference Result 2290 states and 4536 transitions. [2022-01-18 16:29:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:29:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:50,972 INFO L225 Difference]: With dead ends: 2290 [2022-01-18 16:29:50,972 INFO L226 Difference]: Without dead ends: 2242 [2022-01-18 16:29:50,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=371, Invalid=4051, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 16:29:50,972 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:50,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 558 Invalid, 1600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1258 Invalid, 0 Unknown, 299 Unchecked, 0.4s Time] [2022-01-18 16:29:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-01-18 16:29:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1784. [2022-01-18 16:29:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.9955131800336512) internal successors, (3558), 1783 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:50,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3558 transitions. [2022-01-18 16:29:50,988 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3558 transitions. Word has length 33 [2022-01-18 16:29:50,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 3558 transitions. [2022-01-18 16:29:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3558 transitions. [2022-01-18 16:29:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:50,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:50,990 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:51,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:51,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-01-18 16:29:51,203 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:51,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2099215100, now seen corresponding path program 232 times [2022-01-18 16:29:51,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:51,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334523428] [2022-01-18 16:29:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:51,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:51,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334523428] [2022-01-18 16:29:51,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334523428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001314920] [2022-01-18 16:29:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:29:51,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:51,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:51,405 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:51,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 16:29:51,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:29:51,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:51,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:51,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:51,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:52,161 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:52,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:52,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001314920] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:52,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:52,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434648524] [2022-01-18 16:29:52,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:52,214 INFO L87 Difference]: Start difference. First operand 1784 states and 3558 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:53,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:53,107 INFO L93 Difference]: Finished difference Result 2291 states and 4541 transitions. [2022-01-18 16:29:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 16:29:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:53,110 INFO L225 Difference]: With dead ends: 2291 [2022-01-18 16:29:53,110 INFO L226 Difference]: Without dead ends: 2252 [2022-01-18 16:29:53,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=398, Invalid=4294, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:29:53,111 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 163 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 406 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:53,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 440 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1035 Invalid, 0 Unknown, 406 Unchecked, 0.3s Time] [2022-01-18 16:29:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2022-01-18 16:29:53,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1781. [2022-01-18 16:29:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1780 states have (on average 1.996067415730337) internal successors, (3553), 1780 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 3553 transitions. [2022-01-18 16:29:53,128 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 3553 transitions. Word has length 33 [2022-01-18 16:29:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:53,128 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 3553 transitions. [2022-01-18 16:29:53,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 3553 transitions. [2022-01-18 16:29:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:53,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:53,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:53,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:53,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 16:29:53,330 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:53,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1326933022, now seen corresponding path program 233 times [2022-01-18 16:29:53,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:53,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841359678] [2022-01-18 16:29:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:53,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:53,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841359678] [2022-01-18 16:29:53,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841359678] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:53,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880758834] [2022-01-18 16:29:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:53,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:53,604 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:53,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 16:29:53,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:29:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:29:53,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:53,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:53,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:29:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:54,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:54,330 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:54,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:54,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880758834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:54,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:54,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:54,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316581314] [2022-01-18 16:29:54,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:54,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:54,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:54,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:54,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:54,367 INFO L87 Difference]: Start difference. First operand 1781 states and 3553 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:55,608 INFO L93 Difference]: Finished difference Result 2411 states and 4784 transitions. [2022-01-18 16:29:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:29:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:55,611 INFO L225 Difference]: With dead ends: 2411 [2022-01-18 16:29:55,611 INFO L226 Difference]: Without dead ends: 2367 [2022-01-18 16:29:55,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:29:55,611 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 193 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:55,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 467 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1241 Invalid, 0 Unknown, 304 Unchecked, 0.5s Time] [2022-01-18 16:29:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-01-18 16:29:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1780. [2022-01-18 16:29:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.9955030916245082) internal successors, (3550), 1779 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3550 transitions. [2022-01-18 16:29:55,627 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3550 transitions. Word has length 33 [2022-01-18 16:29:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:55,627 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3550 transitions. [2022-01-18 16:29:55,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3550 transitions. [2022-01-18 16:29:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:55,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:55,629 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:55,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:55,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-01-18 16:29:55,829 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -646647864, now seen corresponding path program 234 times [2022-01-18 16:29:55,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:55,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410381074] [2022-01-18 16:29:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:55,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:56,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410381074] [2022-01-18 16:29:56,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410381074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:56,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359624342] [2022-01-18 16:29:56,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:56,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:56,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:56,083 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:56,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 16:29:56,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:29:56,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:56,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:56,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:56,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:56,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-01-18 16:29:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:57,049 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:57,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359624342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:57,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-01-18 16:29:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274924292] [2022-01-18 16:29:57,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:57,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 16:29:57,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:57,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 16:29:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:29:57,115 INFO L87 Difference]: Start difference. First operand 1780 states and 3550 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:58,461 INFO L93 Difference]: Finished difference Result 2428 states and 4820 transitions. [2022-01-18 16:29:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:29:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:58,463 INFO L225 Difference]: With dead ends: 2428 [2022-01-18 16:29:58,464 INFO L226 Difference]: Without dead ends: 2400 [2022-01-18 16:29:58,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 16:29:58,464 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 176 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:58,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 454 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1558 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-01-18 16:29:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-01-18 16:29:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1771. [2022-01-18 16:29:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 1.9954802259887006) internal successors, (3532), 1770 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 3532 transitions. [2022-01-18 16:29:58,481 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 3532 transitions. Word has length 33 [2022-01-18 16:29:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:58,481 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 3532 transitions. [2022-01-18 16:29:58,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 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) [2022-01-18 16:29:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 3532 transitions. [2022-01-18 16:29:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:58,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:58,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:58,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:58,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:58,683 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:29:58,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1722500940, now seen corresponding path program 235 times [2022-01-18 16:29:58,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:58,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555199954] [2022-01-18 16:29:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:58,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:58,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555199954] [2022-01-18 16:29:58,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555199954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887796268] [2022-01-18 16:29:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:58,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:58,953 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:29:58,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 16:29:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:58,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:29:58,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:59,228 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:29:59,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:29:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:59,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:59,757 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:29:59,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:29:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:59,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887796268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:59,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-01-18 16:29:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298488427] [2022-01-18 16:29:59,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:59,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:29:59,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:59,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:29:59,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:29:59,833 INFO L87 Difference]: Start difference. First operand 1771 states and 3532 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:01,250 INFO L93 Difference]: Finished difference Result 2480 states and 4887 transitions. [2022-01-18 16:30:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 16:30:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:01,252 INFO L225 Difference]: With dead ends: 2480 [2022-01-18 16:30:01,252 INFO L226 Difference]: Without dead ends: 2432 [2022-01-18 16:30:01,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=422, Invalid=4408, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 16:30:01,253 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 223 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:01,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 736 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1920 Invalid, 0 Unknown, 30 Unchecked, 0.7s Time] [2022-01-18 16:30:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-01-18 16:30:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1773. [2022-01-18 16:30:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 1.994920993227991) internal successors, (3535), 1772 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 3535 transitions. [2022-01-18 16:30:01,269 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 3535 transitions. Word has length 33 [2022-01-18 16:30:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:01,269 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 3535 transitions. [2022-01-18 16:30:01,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 3535 transitions. [2022-01-18 16:30:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:01,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:01,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:01,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:01,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:01,471 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:01,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1236004204, now seen corresponding path program 236 times [2022-01-18 16:30:01,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:01,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882838880] [2022-01-18 16:30:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:01,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:01,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:01,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882838880] [2022-01-18 16:30:01,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882838880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:01,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370073599] [2022-01-18 16:30:01,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:01,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:01,738 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:01,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 16:30:01,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:01,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:01,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:02,017 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:02,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:30:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:02,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:02,558 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:02,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:02,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370073599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:02,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:02,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-01-18 16:30:02,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893117479] [2022-01-18 16:30:02,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:02,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:30:02,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:30:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:30:02,605 INFO L87 Difference]: Start difference. First operand 1773 states and 3535 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:03,727 INFO L93 Difference]: Finished difference Result 2825 states and 5563 transitions. [2022-01-18 16:30:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:30:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:03,730 INFO L225 Difference]: With dead ends: 2825 [2022-01-18 16:30:03,730 INFO L226 Difference]: Without dead ends: 2777 [2022-01-18 16:30:03,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=4281, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:30:03,731 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 249 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:03,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 523 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1370 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-01-18 16:30:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2022-01-18 16:30:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1772. [2022-01-18 16:30:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.994918125352908) internal successors, (3533), 1771 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 3533 transitions. [2022-01-18 16:30:03,749 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 3533 transitions. Word has length 33 [2022-01-18 16:30:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 3533 transitions. [2022-01-18 16:30:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 3533 transitions. [2022-01-18 16:30:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:03,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:03,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:03,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:03,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2022-01-18 16:30:03,966 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash -472685870, now seen corresponding path program 237 times [2022-01-18 16:30:03,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:03,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444136025] [2022-01-18 16:30:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:03,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:04,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444136025] [2022-01-18 16:30:04,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444136025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283878991] [2022-01-18 16:30:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:04,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:04,233 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:04,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 16:30:04,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:30:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:04,558 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:04,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:04,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:05,123 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:05,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283878991] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:05,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:05,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:30:05,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737096304] [2022-01-18 16:30:05,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:05,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:30:05,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:30:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:30:05,189 INFO L87 Difference]: Start difference. First operand 1772 states and 3533 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:07,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:07,087 INFO L93 Difference]: Finished difference Result 2718 states and 5357 transitions. [2022-01-18 16:30:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 16:30:07,087 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:07,090 INFO L225 Difference]: With dead ends: 2718 [2022-01-18 16:30:07,090 INFO L226 Difference]: Without dead ends: 2670 [2022-01-18 16:30:07,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=601, Invalid=6205, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 16:30:07,090 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 301 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:07,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 703 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1951 Invalid, 0 Unknown, 11 Unchecked, 0.7s Time] [2022-01-18 16:30:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-01-18 16:30:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 1775. [2022-01-18 16:30:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1775 states, 1774 states have (on average 1.996617812852311) internal successors, (3542), 1774 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 3542 transitions. [2022-01-18 16:30:07,107 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 3542 transitions. Word has length 33 [2022-01-18 16:30:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:07,107 INFO L470 AbstractCegarLoop]: Abstraction has 1775 states and 3542 transitions. [2022-01-18 16:30:07,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 3542 transitions. [2022-01-18 16:30:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:07,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:07,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:07,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:07,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:07,318 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:07,318 INFO L85 PathProgramCache]: Analyzing trace with hash 806685844, now seen corresponding path program 238 times [2022-01-18 16:30:07,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:07,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222461315] [2022-01-18 16:30:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:07,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:07,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222461315] [2022-01-18 16:30:07,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222461315] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:07,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36401938] [2022-01-18 16:30:07,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:07,595 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:07,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 16:30:07,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:07,921 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:07,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-01-18 16:30:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:08,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:08,406 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:08,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:08,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36401938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:08,435 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:08,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:30:08,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326831875] [2022-01-18 16:30:08,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:08,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:30:08,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:30:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:30:08,436 INFO L87 Difference]: Start difference. First operand 1775 states and 3542 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:10,632 INFO L93 Difference]: Finished difference Result 2907 states and 5777 transitions. [2022-01-18 16:30:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 16:30:10,632 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:10,635 INFO L225 Difference]: With dead ends: 2907 [2022-01-18 16:30:10,635 INFO L226 Difference]: Without dead ends: 2859 [2022-01-18 16:30:10,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2289 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=741, Invalid=7449, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 16:30:10,636 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 318 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:10,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 527 Invalid, 1863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1760 Invalid, 0 Unknown, 12 Unchecked, 0.7s Time] [2022-01-18 16:30:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-01-18 16:30:10,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 1776. [2022-01-18 16:30:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.996619718309859) internal successors, (3544), 1775 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3544 transitions. [2022-01-18 16:30:10,667 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3544 transitions. Word has length 33 [2022-01-18 16:30:10,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:10,667 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 3544 transitions. [2022-01-18 16:30:10,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:10,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3544 transitions. [2022-01-18 16:30:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:10,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:10,669 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:10,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:10,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:10,887 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2102658862, now seen corresponding path program 239 times [2022-01-18 16:30:10,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344689633] [2022-01-18 16:30:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:10,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:11,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344689633] [2022-01-18 16:30:11,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344689633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:11,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605697894] [2022-01-18 16:30:11,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:30:11,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:11,093 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:11,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 16:30:11,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:30:11,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:11,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:30:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:11,390 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:11,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:11,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:11,812 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:11,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:11,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605697894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:11,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:11,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:30:11,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203368135] [2022-01-18 16:30:11,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:11,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:30:11,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:30:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:30:11,841 INFO L87 Difference]: Start difference. First operand 1776 states and 3544 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:13,597 INFO L93 Difference]: Finished difference Result 3156 states and 6263 transitions. [2022-01-18 16:30:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-18 16:30:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:13,610 INFO L225 Difference]: With dead ends: 3156 [2022-01-18 16:30:13,610 INFO L226 Difference]: Without dead ends: 3112 [2022-01-18 16:30:13,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=772, Invalid=6884, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:30:13,610 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 380 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:13,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 605 Invalid, 2178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1993 Invalid, 0 Unknown, 29 Unchecked, 0.6s Time] [2022-01-18 16:30:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2022-01-18 16:30:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1776. [2022-01-18 16:30:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.996619718309859) internal successors, (3544), 1775 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3544 transitions. [2022-01-18 16:30:13,630 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3544 transitions. Word has length 33 [2022-01-18 16:30:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:13,631 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 3544 transitions. [2022-01-18 16:30:13,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3544 transitions. [2022-01-18 16:30:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:13,632 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:13,632 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:13,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-01-18 16:30:13,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:13,833 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:13,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1551197844, now seen corresponding path program 240 times [2022-01-18 16:30:13,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:13,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873366433] [2022-01-18 16:30:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:13,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:14,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873366433] [2022-01-18 16:30:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873366433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:14,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360302664] [2022-01-18 16:30:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:30:14,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:14,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:14,112 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:14,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 16:30:14,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:30:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:30:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:14,435 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:14,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:14,925 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:14,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:14,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360302664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:14,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:14,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:30:14,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179583436] [2022-01-18 16:30:14,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:14,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:30:14,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:30:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:30:14,958 INFO L87 Difference]: Start difference. First operand 1776 states and 3544 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:17,709 INFO L93 Difference]: Finished difference Result 3081 states and 6095 transitions. [2022-01-18 16:30:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-18 16:30:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:17,712 INFO L225 Difference]: With dead ends: 3081 [2022-01-18 16:30:17,712 INFO L226 Difference]: Without dead ends: 3049 [2022-01-18 16:30:17,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1254, Invalid=10302, Unknown=0, NotChecked=0, Total=11556 [2022-01-18 16:30:17,712 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 460 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1876 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:17,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 475 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1876 Invalid, 0 Unknown, 24 Unchecked, 0.7s Time] [2022-01-18 16:30:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2022-01-18 16:30:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1776. [2022-01-18 16:30:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 1.996619718309859) internal successors, (3544), 1775 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3544 transitions. [2022-01-18 16:30:17,730 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3544 transitions. Word has length 33 [2022-01-18 16:30:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:17,730 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 3544 transitions. [2022-01-18 16:30:17,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3544 transitions. [2022-01-18 16:30:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:17,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:17,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:17,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:17,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 16:30:17,943 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:17,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1317527086, now seen corresponding path program 241 times [2022-01-18 16:30:17,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:17,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134317124] [2022-01-18 16:30:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:17,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:18,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134317124] [2022-01-18 16:30:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134317124] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252771078] [2022-01-18 16:30:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:30:18,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:18,205 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:18,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 16:30:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:18,475 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:18,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-01-18 16:30:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:18,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:19,028 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:19,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-01-18 16:30:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:19,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252771078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:19,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:19,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-01-18 16:30:19,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865921034] [2022-01-18 16:30:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:19,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 16:30:19,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:19,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 16:30:19,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:30:19,060 INFO L87 Difference]: Start difference. First operand 1776 states and 3544 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:22,698 INFO L93 Difference]: Finished difference Result 2825 states and 5585 transitions. [2022-01-18 16:30:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 16:30:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:22,701 INFO L225 Difference]: With dead ends: 2825 [2022-01-18 16:30:22,701 INFO L226 Difference]: Without dead ends: 2797 [2022-01-18 16:30:22,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1673, Invalid=13333, Unknown=0, NotChecked=0, Total=15006 [2022-01-18 16:30:22,702 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 477 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 2745 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 2745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:22,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 644 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 2745 Invalid, 0 Unknown, 14 Unchecked, 0.9s Time] [2022-01-18 16:30:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2022-01-18 16:30:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 1771. [2022-01-18 16:30:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 1.9943502824858756) internal successors, (3530), 1770 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 3530 transitions. [2022-01-18 16:30:22,718 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 3530 transitions. Word has length 33 [2022-01-18 16:30:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:22,718 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 3530 transitions. [2022-01-18 16:30:22,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 3530 transitions. [2022-01-18 16:30:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:22,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:22,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:22,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:22,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-01-18 16:30:22,935 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash 774026312, now seen corresponding path program 242 times [2022-01-18 16:30:22,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:22,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149936472] [2022-01-18 16:30:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:22,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:23,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:23,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149936472] [2022-01-18 16:30:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149936472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:23,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647388937] [2022-01-18 16:30:23,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:23,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:23,126 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:23,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 16:30:23,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:23,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:23,415 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:23,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-01-18 16:30:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:23,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:23,794 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:23,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:23,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647388937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:23,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:23,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:23,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649067192] [2022-01-18 16:30:23,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:23,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:23,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:23,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:23,843 INFO L87 Difference]: Start difference. First operand 1771 states and 3530 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:25,314 INFO L93 Difference]: Finished difference Result 2263 states and 4485 transitions. [2022-01-18 16:30:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 16:30:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:25,316 INFO L225 Difference]: With dead ends: 2263 [2022-01-18 16:30:25,316 INFO L226 Difference]: Without dead ends: 2215 [2022-01-18 16:30:25,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=458, Invalid=4944, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:30:25,317 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 180 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:25,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 555 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 16:30:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2022-01-18 16:30:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 1784. [2022-01-18 16:30:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 1.994391475042064) internal successors, (3556), 1783 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 3556 transitions. [2022-01-18 16:30:25,332 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 3556 transitions. Word has length 33 [2022-01-18 16:30:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:25,332 INFO L470 AbstractCegarLoop]: Abstraction has 1784 states and 3556 transitions. [2022-01-18 16:30:25,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 3556 transitions. [2022-01-18 16:30:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:25,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:25,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:25,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 16:30:25,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:25,547 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:25,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 2053398026, now seen corresponding path program 243 times [2022-01-18 16:30:25,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:25,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509600863] [2022-01-18 16:30:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:25,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:25,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:25,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509600863] [2022-01-18 16:30:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509600863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:25,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088780159] [2022-01-18 16:30:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:25,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:25,803 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:25,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 16:30:25,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:30:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:25,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:30:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:26,196 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:26,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:26,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:26,757 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:26,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:26,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088780159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:26,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:26,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:26,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618004108] [2022-01-18 16:30:26,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:26,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:26,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:26,821 INFO L87 Difference]: Start difference. First operand 1784 states and 3556 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:28,694 INFO L93 Difference]: Finished difference Result 2335 states and 4622 transitions. [2022-01-18 16:30:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 16:30:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:28,697 INFO L225 Difference]: With dead ends: 2335 [2022-01-18 16:30:28,697 INFO L226 Difference]: Without dead ends: 2287 [2022-01-18 16:30:28,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=568, Invalid=5912, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 16:30:28,697 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 195 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 550 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:30:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-01-18 16:30:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1785. [2022-01-18 16:30:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 1.9943946188340806) internal successors, (3558), 1784 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 3558 transitions. [2022-01-18 16:30:28,713 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 3558 transitions. Word has length 33 [2022-01-18 16:30:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:28,713 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 3558 transitions. [2022-01-18 16:30:28,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 3558 transitions. [2022-01-18 16:30:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:28,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:28,715 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:28,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:28,927 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash -855946680, now seen corresponding path program 244 times [2022-01-18 16:30:28,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:28,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741523956] [2022-01-18 16:30:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:28,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:29,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741523956] [2022-01-18 16:30:29,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741523956] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:29,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969178328] [2022-01-18 16:30:29,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:29,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:29,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:29,111 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:29,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 16:30:29,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:29,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:29,453 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:29,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-01-18 16:30:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:29,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:30,025 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:30,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:30,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969178328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:30,077 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:30,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:30,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071589331] [2022-01-18 16:30:30,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:30,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:30,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:30,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:30,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:30,078 INFO L87 Difference]: Start difference. First operand 1785 states and 3558 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:32,413 INFO L93 Difference]: Finished difference Result 2558 states and 5068 transitions. [2022-01-18 16:30:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 16:30:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:32,416 INFO L225 Difference]: With dead ends: 2558 [2022-01-18 16:30:32,416 INFO L226 Difference]: Without dead ends: 2510 [2022-01-18 16:30:32,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=730, Invalid=6926, Unknown=0, NotChecked=0, Total=7656 [2022-01-18 16:30:32,417 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 222 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 2522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:32,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 766 Invalid, 2522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:30:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-01-18 16:30:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1786. [2022-01-18 16:30:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 1.9943977591036415) internal successors, (3560), 1785 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3560 transitions. [2022-01-18 16:30:32,443 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3560 transitions. Word has length 33 [2022-01-18 16:30:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:32,443 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 3560 transitions. [2022-01-18 16:30:32,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3560 transitions. [2022-01-18 16:30:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:32,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:32,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:32,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:32,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 16:30:32,645 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1497057270, now seen corresponding path program 245 times [2022-01-18 16:30:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135674696] [2022-01-18 16:30:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:32,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:32,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135674696] [2022-01-18 16:30:32,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135674696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42583824] [2022-01-18 16:30:32,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:30:32,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:32,923 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:32,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 16:30:32,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:30:32,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:32,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-18 16:30:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:33,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:33,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:33,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2022-01-18 16:30:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:34,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:34,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:34,030 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-01-18 16:30:34,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 57 [2022-01-18 16:30:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:34,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42583824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:34,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:34,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-01-18 16:30:34,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953332099] [2022-01-18 16:30:34,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:34,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-18 16:30:34,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-18 16:30:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 16:30:34,157 INFO L87 Difference]: Start difference. First operand 1786 states and 3560 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:37,805 INFO L93 Difference]: Finished difference Result 2711 states and 5399 transitions. [2022-01-18 16:30:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-18 16:30:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:37,808 INFO L225 Difference]: With dead ends: 2711 [2022-01-18 16:30:37,808 INFO L226 Difference]: Without dead ends: 2635 [2022-01-18 16:30:37,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5504 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1938, Invalid=16152, Unknown=0, NotChecked=0, Total=18090 [2022-01-18 16:30:37,808 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 320 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 858 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:37,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 690 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2691 Invalid, 0 Unknown, 858 Unchecked, 0.8s Time] [2022-01-18 16:30:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-01-18 16:30:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1789. [2022-01-18 16:30:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 1.994407158836689) internal successors, (3566), 1788 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 3566 transitions. [2022-01-18 16:30:37,825 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 3566 transitions. Word has length 33 [2022-01-18 16:30:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:37,825 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 3566 transitions. [2022-01-18 16:30:37,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 3566 transitions. [2022-01-18 16:30:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:37,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:37,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:37,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:38,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:38,031 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -70814904, now seen corresponding path program 246 times [2022-01-18 16:30:38,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482350828] [2022-01-18 16:30:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:38,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:38,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:38,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482350828] [2022-01-18 16:30:38,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482350828] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:38,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379469688] [2022-01-18 16:30:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:30:38,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:38,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:38,296 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:38,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 16:30:38,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:30:38,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:30:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:38,598 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:38,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:38,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:39,031 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:39,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:39,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379469688] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:39,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:39,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:39,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274627623] [2022-01-18 16:30:39,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:39,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:39,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:39,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:39,070 INFO L87 Difference]: Start difference. First operand 1789 states and 3566 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:42,239 INFO L93 Difference]: Finished difference Result 2573 states and 5087 transitions. [2022-01-18 16:30:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-18 16:30:42,239 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:42,242 INFO L225 Difference]: With dead ends: 2573 [2022-01-18 16:30:42,242 INFO L226 Difference]: Without dead ends: 2529 [2022-01-18 16:30:42,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1067, Invalid=8833, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:30:42,243 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 266 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 2687 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:42,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 753 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2687 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:30:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-01-18 16:30:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1788. [2022-01-18 16:30:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 1.9927252378287632) internal successors, (3561), 1787 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3561 transitions. [2022-01-18 16:30:42,260 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3561 transitions. Word has length 33 [2022-01-18 16:30:42,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:42,260 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 3561 transitions. [2022-01-18 16:30:42,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:42,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3561 transitions. [2022-01-18 16:30:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:42,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:42,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:42,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:42,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:42,475 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:42,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:42,475 INFO L85 PathProgramCache]: Analyzing trace with hash -708530616, now seen corresponding path program 247 times [2022-01-18 16:30:42,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:42,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854965292] [2022-01-18 16:30:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:42,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:42,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854965292] [2022-01-18 16:30:42,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854965292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508184063] [2022-01-18 16:30:42,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:30:42,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:42,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:42,663 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:42,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 16:30:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:42,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:42,863 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:42,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:43,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:43,302 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:43,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:43,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508184063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:43,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:43,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:43,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265384007] [2022-01-18 16:30:43,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:43,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:43,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:43,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:43,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:43,344 INFO L87 Difference]: Start difference. First operand 1788 states and 3561 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:44,471 INFO L93 Difference]: Finished difference Result 2319 states and 4612 transitions. [2022-01-18 16:30:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:30:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:44,474 INFO L225 Difference]: With dead ends: 2319 [2022-01-18 16:30:44,474 INFO L226 Difference]: Without dead ends: 2291 [2022-01-18 16:30:44,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=534, Invalid=5016, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 16:30:44,474 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:44,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 415 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:30:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-01-18 16:30:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1780. [2022-01-18 16:30:44,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 1.9926925238898257) internal successors, (3545), 1779 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:44,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3545 transitions. [2022-01-18 16:30:44,510 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3545 transitions. Word has length 33 [2022-01-18 16:30:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:44,510 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3545 transitions. [2022-01-18 16:30:44,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:44,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3545 transitions. [2022-01-18 16:30:44,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:44,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:44,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:44,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:44,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:44,719 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1768093190, now seen corresponding path program 248 times [2022-01-18 16:30:44,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321669511] [2022-01-18 16:30:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:44,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:44,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321669511] [2022-01-18 16:30:44,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321669511] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:44,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104803539] [2022-01-18 16:30:44,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:30:44,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:44,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:44,974 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:44,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 16:30:44,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:30:44,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:45,245 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-18 16:30:45,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2022-01-18 16:30:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:45,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:45,613 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:45,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:45,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104803539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:45,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:45,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:45,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644391796] [2022-01-18 16:30:45,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:45,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:45,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:45,660 INFO L87 Difference]: Start difference. First operand 1780 states and 3545 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:47,529 INFO L93 Difference]: Finished difference Result 2256 states and 4457 transitions. [2022-01-18 16:30:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 16:30:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:47,532 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 16:30:47,532 INFO L226 Difference]: Without dead ends: 2160 [2022-01-18 16:30:47,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=709, Invalid=7123, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 16:30:47,532 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 218 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:47,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 533 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 16:30:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2022-01-18 16:30:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1795. [2022-01-18 16:30:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 1.9938684503901896) internal successors, (3577), 1794 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 3577 transitions. [2022-01-18 16:30:47,548 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 3577 transitions. Word has length 33 [2022-01-18 16:30:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:47,548 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 3577 transitions. [2022-01-18 16:30:47,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 3577 transitions. [2022-01-18 16:30:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:47,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:47,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:47,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:47,764 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash -356119740, now seen corresponding path program 249 times [2022-01-18 16:30:47,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046807037] [2022-01-18 16:30:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:47,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:48,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046807037] [2022-01-18 16:30:48,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046807037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188618368] [2022-01-18 16:30:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:48,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:48,019 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:48,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 16:30:48,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:30:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:48,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-18 16:30:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:48,334 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:48,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:48,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:49,099 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:49,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 65 [2022-01-18 16:30:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188618368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:49,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:49,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:30:49,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031320331] [2022-01-18 16:30:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:49,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:30:49,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:49,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:30:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1845, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:30:49,162 INFO L87 Difference]: Start difference. First operand 1795 states and 3577 transitions. Second operand has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:54,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:54,884 INFO L93 Difference]: Finished difference Result 2681 states and 5270 transitions. [2022-01-18 16:30:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-18 16:30:54,884 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:54,887 INFO L225 Difference]: With dead ends: 2681 [2022-01-18 16:30:54,887 INFO L226 Difference]: Without dead ends: 2524 [2022-01-18 16:30:54,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7227 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2246, Invalid=19510, Unknown=0, NotChecked=0, Total=21756 [2022-01-18 16:30:54,888 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 403 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 4378 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 4378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:54,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 838 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 4378 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 16:30:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2022-01-18 16:30:54,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 1795. [2022-01-18 16:30:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 1.9921962095875139) internal successors, (3574), 1794 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 3574 transitions. [2022-01-18 16:30:54,906 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 3574 transitions. Word has length 33 [2022-01-18 16:30:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:54,906 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 3574 transitions. [2022-01-18 16:30:54,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 45 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:54,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 3574 transitions. [2022-01-18 16:30:54,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:54,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:54,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:54,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:55,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-01-18 16:30:55,112 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1270752486, now seen corresponding path program 250 times [2022-01-18 16:30:55,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:55,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404022226] [2022-01-18 16:30:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:55,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:55,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404022226] [2022-01-18 16:30:55,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404022226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159913453] [2022-01-18 16:30:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:55,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:55,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:55,374 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:55,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 16:30:55,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:55,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:55,657 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:55,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:55,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:56,296 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:30:56,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:30:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:56,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159913453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:56,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:56,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:30:56,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602626984] [2022-01-18 16:30:56,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:56,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:30:56,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:30:56,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:30:56,359 INFO L87 Difference]: Start difference. First operand 1795 states and 3574 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:59,162 INFO L93 Difference]: Finished difference Result 2304 states and 4551 transitions. [2022-01-18 16:30:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 16:30:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:30:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:59,165 INFO L225 Difference]: With dead ends: 2304 [2022-01-18 16:30:59,165 INFO L226 Difference]: Without dead ends: 2220 [2022-01-18 16:30:59,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2758 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1046, Invalid=9054, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 16:30:59,166 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 227 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2656 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:59,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 545 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 16:30:59,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2022-01-18 16:30:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1803. [2022-01-18 16:30:59,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.9916759156492785) internal successors, (3589), 1802 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3589 transitions. [2022-01-18 16:30:59,188 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3589 transitions. Word has length 33 [2022-01-18 16:30:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:59,189 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3589 transitions. [2022-01-18 16:30:59,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:30:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3589 transitions. [2022-01-18 16:30:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:59,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:59,190 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:59,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:59,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-01-18 16:30:59,406 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:30:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1440778296, now seen corresponding path program 251 times [2022-01-18 16:30:59,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:59,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912758881] [2022-01-18 16:30:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:59,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:59,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:59,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:59,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912758881] [2022-01-18 16:30:59,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912758881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:59,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433699796] [2022-01-18 16:30:59,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:30:59,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:59,593 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:30:59,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 16:30:59,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:30:59,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 16:30:59,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:59,864 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:59,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:30:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:59,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:00,228 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:00,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:31:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:00,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433699796] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:00,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:00,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:31:00,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474557587] [2022-01-18 16:31:00,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:00,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:31:00,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:00,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:31:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:31:00,267 INFO L87 Difference]: Start difference. First operand 1803 states and 3589 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:31:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:02,789 INFO L93 Difference]: Finished difference Result 2425 states and 4797 transitions. [2022-01-18 16:31:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-18 16:31:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) Word has length 33 [2022-01-18 16:31:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:02,792 INFO L225 Difference]: With dead ends: 2425 [2022-01-18 16:31:02,792 INFO L226 Difference]: Without dead ends: 2297 [2022-01-18 16:31:02,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3882 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=954, Invalid=11256, Unknown=0, NotChecked=0, Total=12210 [2022-01-18 16:31:02,793 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 237 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:02,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 481 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 16:31:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-01-18 16:31:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1866. [2022-01-18 16:31:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 2.0) internal successors, (3730), 1865 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 3730 transitions. [2022-01-18 16:31:02,810 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 3730 transitions. Word has length 33 [2022-01-18 16:31:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:02,810 INFO L470 AbstractCegarLoop]: Abstraction has 1866 states and 3730 transitions. [2022-01-18 16:31:02,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) 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) [2022-01-18 16:31:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 3730 transitions. [2022-01-18 16:31:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:31:02,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:02,812 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:02,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:03,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 16:31:03,026 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:31:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:03,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1468566410, now seen corresponding path program 252 times [2022-01-18 16:31:03,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:03,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344173141] [2022-01-18 16:31:03,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:03,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:03,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344173141] [2022-01-18 16:31:03,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344173141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468452212] [2022-01-18 16:31:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:31:03,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:03,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:03,225 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:03,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 16:31:03,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:31:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:31:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:03,535 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:03,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:31:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:03,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:03,986 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:03,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2022-01-18 16:31:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:04,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468452212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:04,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:04,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-01-18 16:31:04,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791521311] [2022-01-18 16:31:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:04,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 16:31:04,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:04,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 16:31:04,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 16:31:04,024 INFO L87 Difference]: Start difference. First operand 1866 states and 3730 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:31:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:09,547 INFO L93 Difference]: Finished difference Result 2733 states and 5398 transitions. [2022-01-18 16:31:09,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-18 16:31:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:31:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:09,550 INFO L225 Difference]: With dead ends: 2733 [2022-01-18 16:31:09,550 INFO L226 Difference]: Without dead ends: 2490 [2022-01-18 16:31:09,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9126 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2029, Invalid=24053, Unknown=0, NotChecked=0, Total=26082 [2022-01-18 16:31:09,551 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 395 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 4482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:09,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 850 Invalid, 4482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 16:31:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2022-01-18 16:31:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1923. [2022-01-18 16:31:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1922 states have (on average 2.0036420395421435) internal successors, (3851), 1922 states have internal predecessors, (3851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 3851 transitions. [2022-01-18 16:31:09,569 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 3851 transitions. Word has length 33 [2022-01-18 16:31:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:09,569 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 3851 transitions. [2022-01-18 16:31:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 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) [2022-01-18 16:31:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 3851 transitions. [2022-01-18 16:31:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:31:09,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:09,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:09,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:09,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:09,775 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 16:31:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2109677000, now seen corresponding path program 253 times [2022-01-18 16:31:09,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:09,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710747515] [2022-01-18 16:31:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:09,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:10,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:10,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710747515] [2022-01-18 16:31:10,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710747515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:10,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802465408] [2022-01-18 16:31:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:31:10,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:10,029 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 16:31:10,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 16:31:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:31:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:10,337 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:10,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-01-18 16:31:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:10,859 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 16:31:10,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-01-18 16:31:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:10,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802465408] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:10,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:10,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-01-18 16:31:10,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601345327] [2022-01-18 16:31:10,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:10,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 16:31:10,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:10,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 16:31:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:31:10,904 INFO L87 Difference]: Start difference. First operand 1923 states and 3851 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) 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) Received shutdown request... [2022-01-18 16:31:12,971 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:31:12,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-18 16:31:12,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2955 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1171, Invalid=8729, Unknown=0, NotChecked=0, Total=9900 [2022-01-18 16:31:12,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1839 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:12,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 251 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1839 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 16:31:12,981 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 16:31:12,983 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:31:13,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:13,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:13,183 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1923states) and FLOYD_HOARE automaton (currently 65 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (722 states constructed, input type IntersectNwa). [2022-01-18 16:31:13,184 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 16:31:13,184 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 16:31:13,186 INFO L732 BasicCegarLoop]: Path program histogram: [253, 5, 1] [2022-01-18 16:31:13,187 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:31:13,187 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:31:13,189 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:31:13 BasicIcfg [2022-01-18 16:31:13,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:31:13,189 INFO L158 Benchmark]: Toolchain (without parser) took 920388.93ms. Allocated memory was 331.4MB in the beginning and 513.8MB in the end (delta: 182.5MB). Free memory was 289.5MB in the beginning and 470.1MB in the end (delta: -180.6MB). Peak memory consumption was 297.5MB. Max. memory is 16.0GB. [2022-01-18 16:31:13,189 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 331.4MB. Free memory is still 290.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:31:13,189 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.20ms. Allocated memory is still 331.4MB. Free memory was 289.5MB in the beginning and 287.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:31:13,189 INFO L158 Benchmark]: Boogie Preprocessor took 19.34ms. Allocated memory is still 331.4MB. Free memory was 287.9MB in the beginning and 287.0MB in the end (delta: 924.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:31:13,189 INFO L158 Benchmark]: RCFGBuilder took 236.95ms. Allocated memory is still 331.4MB. Free memory was 286.9MB in the beginning and 277.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:31:13,189 INFO L158 Benchmark]: TraceAbstraction took 920103.71ms. Allocated memory was 331.4MB in the beginning and 513.8MB in the end (delta: 182.5MB). Free memory was 277.3MB in the beginning and 470.1MB in the end (delta: -192.8MB). Peak memory consumption was 284.9MB. Max. memory is 16.0GB. [2022-01-18 16:31:13,190 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 0.11ms. Allocated memory is still 331.4MB. Free memory is still 290.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.20ms. Allocated memory is still 331.4MB. Free memory was 289.5MB in the beginning and 287.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.34ms. Allocated memory is still 331.4MB. Free memory was 287.9MB in the beginning and 287.0MB in the end (delta: 924.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 236.95ms. Allocated memory is still 331.4MB. Free memory was 286.9MB in the beginning and 277.8MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 920103.71ms. Allocated memory was 331.4MB in the beginning and 513.8MB in the end (delta: 182.5MB). Free memory was 277.3MB in the beginning and 470.1MB in the end (delta: -192.8MB). Peak memory consumption was 284.9MB. Max. memory is 16.0GB. * 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 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1923states) and FLOYD_HOARE automaton (currently 65 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (722 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1923states) and FLOYD_HOARE automaton (currently 65 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (722 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1923states) and FLOYD_HOARE automaton (currently 65 states, 42 states before enhancement),while ReachableStatesComputation was computing reachable states (722 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 920.0s, OverallIterations: 259, TraceHistogramMax: 3, PathProgramHistogramMax: 253, EmptinessCheckTime: 0.3s, AutomataDifference: 566.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61339 SdHoareTripleChecker+Valid, 167.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61339 mSDsluCounter, 136042 SdHoareTripleChecker+Invalid, 142.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 73026 IncrementalHoareTripleChecker+Unchecked, 212557 mSDsCounter, 26131 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 475316 IncrementalHoareTripleChecker+Invalid, 574473 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 26131 mSolverCounterUnsat, 9184 mSDtfsCounter, 475316 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 35153 GetRequests, 9615 SyntacticMatches, 2228 SemanticMatches, 23310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741996 ImplicationChecksByTransitivity, 546.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1923occurred in iteration=258, InterpolantAutomatonStates: 17139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 258 MinimizatonAttempts, 121431 StatesRemovedByMinimization, 256 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 287.7s InterpolantComputationTime, 16618 NumberOfCodeBlocks, 16618 NumberOfCodeBlocksAsserted, 818 NumberOfCheckSat, 24115 ConstructedInterpolants, 1648 QuantifiedInterpolants, 397846 SizeOfPredicates, 2985 NumberOfNonLiveVariables, 18329 ConjunctsInSsa, 8329 ConjunctsInUnsatCore, 772 InterpolantComputations, 3 PerfectInterpolantSequences, 57/14446 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown