/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-more/queue-add-2-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 17:31:39,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 17:31:39,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 17:31:39,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-18 17:31:39,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-18 17:31:39,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-18 17:31:39,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-18 17:31:39,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-18 17:31:39,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-18 17:31:39,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-18 17:31:39,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-18 17:31:39,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-18 17:31:39,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-18 17:31:39,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-18 17:31:39,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-18 17:31:39,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-18 17:31:39,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-18 17:31:39,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-18 17:31:39,597 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-18 17:31:39,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-18 17:31:39,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-18 17:31:39,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-18 17:31:39,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-18 17:31:39,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-18 17:31:39,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-18 17:31:39,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 17:31:39,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 17:31:39,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 17:31:39,620 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 17:31:39,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 17:31:39,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 17:31:39,642 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 17:31:39,642 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 17:31:39,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 17:31:39,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 17:31:39,643 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 17:31:39,643 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 17:31:39,643 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 17:31:39,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 17:31:39,644 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 17:31:39,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 17:31:39,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 17:31:39,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 17:31:39,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 17:31:39,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 17:31:39,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 17:31:39,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:31:39,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 17:31:39,647 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 17:31:39,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 17:31:39,648 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 17:31:39,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 17:31:39,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 17:31:39,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 17:31:39,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 17:31:39,896 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 17:31:39,897 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 17:31:39,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl [2022-01-18 17:31:39,898 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-2-nl.wvr.bpl' [2022-01-18 17:31:39,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 17:31:39,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 17:31:39,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 17:31:39,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 17:31:39,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 17:31:39,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,954 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 17:31:39,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 17:31:39,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 17:31:39,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 17:31:39,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 17:31:39,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 17:31:39,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 17:31:39,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 17:31:39,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 17:31:39,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/1) ... [2022-01-18 17:31:39,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 17:31:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:40,017 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 17:31:40,035 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 17:31:40,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 17:31:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 17:31:40,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 17:31:40,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 17:31:40,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 17:31:40,053 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 17:31:40,053 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 17:31:40,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 17:31:40,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 17:31:40,054 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 17:31:40,099 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 17:31:40,100 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 17:31:40,207 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 17:31:40,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 17:31:40,221 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 17:31:40,222 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:31:40 BoogieIcfgContainer [2022-01-18 17:31:40,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 17:31:40,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 17:31:40,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 17:31:40,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 17:31:40,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 05:31:39" (1/2) ... [2022-01-18 17:31:40,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5babf16 and model type queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 05:31:40, skipping insertion in model container [2022-01-18 17:31:40,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 05:31:40" (2/2) ... [2022-01-18 17:31:40,229 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2-nl.wvr.bpl [2022-01-18 17:31:40,233 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 17:31:40,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 17:31:40,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 17:31:40,233 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 17:31:40,259 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 17:31:40,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 17:31:40,342 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 17:31:40,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 17:31:40,372 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 29 transitions, 74 flow [2022-01-18 17:31:40,400 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 17:31:40,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:40,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:40,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1778097953, now seen corresponding path program 1 times [2022-01-18 17:31:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:40,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823181085] [2022-01-18 17:31:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:40,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:40,532 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 17:31:40,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823181085] [2022-01-18 17:31:40,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823181085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:31:40,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:31:40,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 17:31:40,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479844170] [2022-01-18 17:31:40,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:31:40,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:31:40,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:40,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:31:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:31:40,564 INFO L87 Difference]: Start difference. First operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:40,601 INFO L93 Difference]: Finished difference Result 114 states and 223 transitions. [2022-01-18 17:31:40,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:31:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 17:31:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:40,611 INFO L225 Difference]: With dead ends: 114 [2022-01-18 17:31:40,612 INFO L226 Difference]: Without dead ends: 114 [2022-01-18 17:31:40,613 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 17:31:40,616 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 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 17:31:40,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:31:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-01-18 17:31:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-01-18 17:31:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2022-01-18 17:31:40,691 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 16 [2022-01-18 17:31:40,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:40,691 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2022-01-18 17:31:40,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2022-01-18 17:31:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:40,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:40,693 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] [2022-01-18 17:31:40,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 17:31:40,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -327311045, now seen corresponding path program 1 times [2022-01-18 17:31:40,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:40,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004593381] [2022-01-18 17:31:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:40,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:41,144 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 17:31:41,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:41,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004593381] [2022-01-18 17:31:41,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004593381] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:41,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333160646] [2022-01-18 17:31:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:41,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:41,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:41,151 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 17:31:41,185 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 17:31:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:41,673 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 17:31:41,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:42,018 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 17:31:42,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333160646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:42,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:42,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-18 17:31:42,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343014449] [2022-01-18 17:31:42,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:42,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 17:31:42,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 17:31:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 17:31:42,022 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:42,798 INFO L93 Difference]: Finished difference Result 299 states and 565 transitions. [2022-01-18 17:31:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:31:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:42,801 INFO L225 Difference]: With dead ends: 299 [2022-01-18 17:31:42,802 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 17:31:42,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:31:42,804 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 176 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:42,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 249 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:42,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 17:31:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 153. [2022-01-18 17:31:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.9407894736842106) internal successors, (295), 152 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 295 transitions. [2022-01-18 17:31:42,819 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 295 transitions. Word has length 21 [2022-01-18 17:31:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:42,820 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 295 transitions. [2022-01-18 17:31:42,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 295 transitions. [2022-01-18 17:31:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:42,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:42,822 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] [2022-01-18 17:31:42,850 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 17:31:43,045 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 17:31:43,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash -411096687, now seen corresponding path program 2 times [2022-01-18 17:31:43,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:43,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023762835] [2022-01-18 17:31:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:43,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:43,254 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 17:31:43,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:43,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023762835] [2022-01-18 17:31:43,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023762835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:43,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963563119] [2022-01-18 17:31:43,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:43,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:43,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:43,256 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 17:31:43,287 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 17:31:43,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:43,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 17:31:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:43,658 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 17:31:43,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:43,925 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 17:31:43,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963563119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:43,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:43,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-01-18 17:31:43,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126727575] [2022-01-18 17:31:43,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:43,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 17:31:43,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 17:31:43,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-01-18 17:31:43,928 INFO L87 Difference]: Start difference. First operand 153 states and 295 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:44,809 INFO L93 Difference]: Finished difference Result 275 states and 526 transitions. [2022-01-18 17:31:44,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:31:44,810 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:44,811 INFO L225 Difference]: With dead ends: 275 [2022-01-18 17:31:44,811 INFO L226 Difference]: Without dead ends: 264 [2022-01-18 17:31:44,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:31:44,813 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:44,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 229 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-18 17:31:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 157. [2022-01-18 17:31:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9423076923076923) internal successors, (303), 156 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 303 transitions. [2022-01-18 17:31:44,823 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 303 transitions. Word has length 21 [2022-01-18 17:31:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:44,823 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 303 transitions. [2022-01-18 17:31:44,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 303 transitions. [2022-01-18 17:31:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:44,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:44,824 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] [2022-01-18 17:31:44,845 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 17:31:45,039 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 17:31:45,040 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 470969037, now seen corresponding path program 3 times [2022-01-18 17:31:45,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:45,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474258455] [2022-01-18 17:31:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:45,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:45,215 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 17:31:45,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:45,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474258455] [2022-01-18 17:31:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474258455] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004685685] [2022-01-18 17:31:45,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:45,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:45,221 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 17:31:45,250 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 17:31:45,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:31:45,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:45,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:45,515 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 17:31:45,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:45,792 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 17:31:45,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004685685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:45,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:45,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-18 17:31:45,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523876223] [2022-01-18 17:31:45,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:45,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:31:45,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:31:45,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:31:45,794 INFO L87 Difference]: Start difference. First operand 157 states and 303 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:46,480 INFO L93 Difference]: Finished difference Result 232 states and 449 transitions. [2022-01-18 17:31:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:31:46,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:46,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:46,483 INFO L225 Difference]: With dead ends: 232 [2022-01-18 17:31:46,483 INFO L226 Difference]: Without dead ends: 225 [2022-01-18 17:31:46,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:31:46,484 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:46,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 146 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-18 17:31:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 155. [2022-01-18 17:31:46,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9415584415584415) internal successors, (299), 154 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 299 transitions. [2022-01-18 17:31:46,492 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 299 transitions. Word has length 21 [2022-01-18 17:31:46,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:46,492 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 299 transitions. [2022-01-18 17:31:46,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,493 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 299 transitions. [2022-01-18 17:31:46,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:46,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:46,494 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] [2022-01-18 17:31:46,519 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 17:31:46,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:46,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:46,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1099615469, now seen corresponding path program 4 times [2022-01-18 17:31:46,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:46,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418969963] [2022-01-18 17:31:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:46,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:46,730 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 17:31:46,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:46,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418969963] [2022-01-18 17:31:46,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418969963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:31:46,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:31:46,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 17:31:46,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079110808] [2022-01-18 17:31:46,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:31:46,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 17:31:46,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:46,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 17:31:46,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 17:31:46,732 INFO L87 Difference]: Start difference. First operand 155 states and 299 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:46,741 INFO L93 Difference]: Finished difference Result 157 states and 301 transitions. [2022-01-18 17:31:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 17:31:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:46,743 INFO L225 Difference]: With dead ends: 157 [2022-01-18 17:31:46,743 INFO L226 Difference]: Without dead ends: 157 [2022-01-18 17:31:46,743 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 17:31:46,744 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 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 17:31:46,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:31:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-18 17:31:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-01-18 17:31:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.9294871794871795) internal successors, (301), 156 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 301 transitions. [2022-01-18 17:31:46,750 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 301 transitions. Word has length 21 [2022-01-18 17:31:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:46,751 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 301 transitions. [2022-01-18 17:31:46,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:46,751 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 301 transitions. [2022-01-18 17:31:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:46,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:46,752 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] [2022-01-18 17:31:46,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 17:31:46,752 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 925568723, now seen corresponding path program 5 times [2022-01-18 17:31:46,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671275156] [2022-01-18 17:31:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:46,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:46,939 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 17:31:46,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:46,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671275156] [2022-01-18 17:31:46,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671275156] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:46,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324581077] [2022-01-18 17:31:46,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:46,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:46,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:46,944 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 17:31:46,955 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 17:31:46,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:46,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:46,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-18 17:31:46,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:47,163 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 17:31:47,286 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 17:31:47,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:47,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:31:47,460 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 34 [2022-01-18 17:31:47,686 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 17:31:47,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324581077] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:47,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:47,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:31:47,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645006831] [2022-01-18 17:31:47,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:47,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:31:47,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:47,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:31:47,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:31:47,688 INFO L87 Difference]: Start difference. First operand 157 states and 301 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:48,709 INFO L93 Difference]: Finished difference Result 278 states and 524 transitions. [2022-01-18 17:31:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:31:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:48,711 INFO L225 Difference]: With dead ends: 278 [2022-01-18 17:31:48,711 INFO L226 Difference]: Without dead ends: 269 [2022-01-18 17:31:48,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:31:48,712 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 118 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:48,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 397 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:31:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-18 17:31:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 168. [2022-01-18 17:31:48,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9401197604790419) internal successors, (324), 167 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 324 transitions. [2022-01-18 17:31:48,719 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 324 transitions. Word has length 21 [2022-01-18 17:31:48,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:48,719 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 324 transitions. [2022-01-18 17:31:48,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 324 transitions. [2022-01-18 17:31:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:48,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:48,729 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] [2022-01-18 17:31:48,762 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 17:31:48,959 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 17:31:48,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1018666131, now seen corresponding path program 6 times [2022-01-18 17:31:48,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580543695] [2022-01-18 17:31:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:48,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:49,164 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 17:31:49,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580543695] [2022-01-18 17:31:49,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580543695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:49,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347920603] [2022-01-18 17:31:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:31:49,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:49,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:49,168 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 17:31:49,178 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 17:31:49,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:31:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:49,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:49,431 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 17:31:49,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:49,704 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 17:31:49,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347920603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:49,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:49,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-01-18 17:31:49,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084681243] [2022-01-18 17:31:49,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:49,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:31:49,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:31:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:31:49,707 INFO L87 Difference]: Start difference. First operand 168 states and 324 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:50,312 INFO L93 Difference]: Finished difference Result 301 states and 564 transitions. [2022-01-18 17:31:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 17:31:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:50,321 INFO L225 Difference]: With dead ends: 301 [2022-01-18 17:31:50,321 INFO L226 Difference]: Without dead ends: 287 [2022-01-18 17:31:50,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 17:31:50,323 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:50,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-18 17:31:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 166. [2022-01-18 17:31:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9393939393939394) internal successors, (320), 165 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 320 transitions. [2022-01-18 17:31:50,329 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 320 transitions. Word has length 21 [2022-01-18 17:31:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:50,329 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 320 transitions. [2022-01-18 17:31:50,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 320 transitions. [2022-01-18 17:31:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:50,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:50,330 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] [2022-01-18 17:31:50,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-18 17:31:50,543 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 17:31:50,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:50,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:50,544 INFO L85 PathProgramCache]: Analyzing trace with hash -96963991, now seen corresponding path program 7 times [2022-01-18 17:31:50,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:50,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65521838] [2022-01-18 17:31:50,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:50,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:50,742 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 17:31:50,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:50,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65521838] [2022-01-18 17:31:50,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65521838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:50,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110867964] [2022-01-18 17:31:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:31:50,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:50,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:50,744 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 17:31:50,781 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 17:31:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:51,014 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 17:31:51,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:51,296 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 17:31:51,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110867964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:51,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:51,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:31:51,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519014840] [2022-01-18 17:31:51,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:51,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:31:51,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:31:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:31:51,298 INFO L87 Difference]: Start difference. First operand 166 states and 320 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:51,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:51,913 INFO L93 Difference]: Finished difference Result 297 states and 558 transitions. [2022-01-18 17:31:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:31:51,914 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:51,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:51,915 INFO L225 Difference]: With dead ends: 297 [2022-01-18 17:31:51,915 INFO L226 Difference]: Without dead ends: 290 [2022-01-18 17:31:51,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:31:51,916 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:51,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 214 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 17:31:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-18 17:31:51,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 160. [2022-01-18 17:31:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9433962264150944) internal successors, (309), 159 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 309 transitions. [2022-01-18 17:31:51,922 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 309 transitions. Word has length 21 [2022-01-18 17:31:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:51,922 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 309 transitions. [2022-01-18 17:31:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 309 transitions. [2022-01-18 17:31:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:51,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:51,923 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] [2022-01-18 17:31:51,947 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 17:31:52,147 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 17:31:52,147 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:52,148 INFO L85 PathProgramCache]: Analyzing trace with hash 585868805, now seen corresponding path program 8 times [2022-01-18 17:31:52,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:52,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381919130] [2022-01-18 17:31:52,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:52,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:52,301 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 17:31:52,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381919130] [2022-01-18 17:31:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381919130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900256215] [2022-01-18 17:31:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:52,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:52,303 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 17:31:52,303 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 17:31:52,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:52,565 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 17:31:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:52,843 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 17:31:52,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900256215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:52,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:52,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 17:31:52,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854321491] [2022-01-18 17:31:52,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:52,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:31:52,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:52,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:31:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:31:52,844 INFO L87 Difference]: Start difference. First operand 160 states and 309 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:53,519 INFO L93 Difference]: Finished difference Result 274 states and 517 transitions. [2022-01-18 17:31:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:31:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:53,521 INFO L225 Difference]: With dead ends: 274 [2022-01-18 17:31:53,521 INFO L226 Difference]: Without dead ends: 265 [2022-01-18 17:31:53,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:31:53,522 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:53,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 210 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-18 17:31:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 167. [2022-01-18 17:31:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.9457831325301205) internal successors, (323), 166 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 323 transitions. [2022-01-18 17:31:53,527 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 323 transitions. Word has length 21 [2022-01-18 17:31:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:53,528 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 323 transitions. [2022-01-18 17:31:53,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 323 transitions. [2022-01-18 17:31:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:53,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:53,529 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] [2022-01-18 17:31:53,551 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 17:31:53,751 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 17:31:53,751 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1467934529, now seen corresponding path program 9 times [2022-01-18 17:31:53,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56461131] [2022-01-18 17:31:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:53,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:53,924 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 17:31:53,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56461131] [2022-01-18 17:31:53,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56461131] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:53,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868122847] [2022-01-18 17:31:53,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:31:53,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:53,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:53,925 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 17:31:53,926 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 17:31:53,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:31:53,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:54,167 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 17:31:54,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:54,457 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 17:31:54,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868122847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:54,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-01-18 17:31:54,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500740393] [2022-01-18 17:31:54,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 17:31:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 17:31:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-01-18 17:31:54,459 INFO L87 Difference]: Start difference. First operand 167 states and 323 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:55,241 INFO L93 Difference]: Finished difference Result 234 states and 446 transitions. [2022-01-18 17:31:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 17:31:55,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:55,242 INFO L225 Difference]: With dead ends: 234 [2022-01-18 17:31:55,242 INFO L226 Difference]: Without dead ends: 227 [2022-01-18 17:31:55,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:31:55,243 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 152 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:55,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 165 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-18 17:31:55,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 165. [2022-01-18 17:31:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.9451219512195121) internal successors, (319), 164 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 319 transitions. [2022-01-18 17:31:55,248 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 319 transitions. Word has length 21 [2022-01-18 17:31:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:55,248 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 319 transitions. [2022-01-18 17:31:55,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 319 transitions. [2022-01-18 17:31:55,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:55,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:55,249 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] [2022-01-18 17:31:55,273 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 17:31:55,459 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 17:31:55,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:55,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1358366049, now seen corresponding path program 10 times [2022-01-18 17:31:55,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:55,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127243526] [2022-01-18 17:31:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:55,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:55,633 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 17:31:55,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127243526] [2022-01-18 17:31:55,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127243526] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:55,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969662441] [2022-01-18 17:31:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:31:55,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:55,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:55,636 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 17:31:55,641 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 17:31:55,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:31:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:55,859 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 17:31:55,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:56,075 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 17:31:56,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969662441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:56,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:56,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-01-18 17:31:56,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357066349] [2022-01-18 17:31:56,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:56,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 17:31:56,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:56,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 17:31:56,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-01-18 17:31:56,077 INFO L87 Difference]: Start difference. First operand 165 states and 319 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:56,652 INFO L93 Difference]: Finished difference Result 302 states and 566 transitions. [2022-01-18 17:31:56,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 17:31:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:56,656 INFO L225 Difference]: With dead ends: 302 [2022-01-18 17:31:56,656 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 17:31:56,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:31:56,657 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:56,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 271 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 17:31:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 17:31:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 163. [2022-01-18 17:31:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.9444444444444444) internal successors, (315), 162 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 315 transitions. [2022-01-18 17:31:56,663 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 315 transitions. Word has length 21 [2022-01-18 17:31:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:56,663 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 315 transitions. [2022-01-18 17:31:56,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:56,663 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 315 transitions. [2022-01-18 17:31:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-18 17:31:56,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:56,664 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] [2022-01-18 17:31:56,685 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 17:31:56,864 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 17:31:56,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash -436663909, now seen corresponding path program 11 times [2022-01-18 17:31:56,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:56,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047511945] [2022-01-18 17:31:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:56,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:57,069 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 17:31:57,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047511945] [2022-01-18 17:31:57,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047511945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:57,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736003316] [2022-01-18 17:31:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:31:57,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:57,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:57,070 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 17:31:57,071 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 17:31:57,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-18 17:31:57,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:57,314 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 17:31:57,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:57,569 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 17:31:57,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736003316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:57,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:57,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-01-18 17:31:57,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689708270] [2022-01-18 17:31:57,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:57,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 17:31:57,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 17:31:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-18 17:31:57,570 INFO L87 Difference]: Start difference. First operand 163 states and 315 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:58,275 INFO L93 Difference]: Finished difference Result 312 states and 580 transitions. [2022-01-18 17:31:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 17:31:58,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-18 17:31:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:58,280 INFO L225 Difference]: With dead ends: 312 [2022-01-18 17:31:58,281 INFO L226 Difference]: Without dead ends: 302 [2022-01-18 17:31:58,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:31:58,281 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:58,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 228 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 624 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-01-18 17:31:58,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-18 17:31:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 154. [2022-01-18 17:31:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.934640522875817) internal successors, (296), 153 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 296 transitions. [2022-01-18 17:31:58,285 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 296 transitions. Word has length 21 [2022-01-18 17:31:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:58,286 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 296 transitions. [2022-01-18 17:31:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 296 transitions. [2022-01-18 17:31:58,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-18 17:31:58,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:58,288 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, 1, 1, 1] [2022-01-18 17:31:58,305 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 17:31:58,495 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 17:31:58,495 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash -457303751, now seen corresponding path program 1 times [2022-01-18 17:31:58,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:58,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555272294] [2022-01-18 17:31:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:58,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:58,535 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 17:31:58,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:58,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555272294] [2022-01-18 17:31:58,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555272294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:58,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468061580] [2022-01-18 17:31:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:58,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:58,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:58,537 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 17:31:58,566 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 17:31:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-18 17:31:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:58,604 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 17:31:58,619 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 17:31:58,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:31:58,670 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 17:31:58,671 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 17:31:58,677 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 17:31:58,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468061580] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:31:58,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:31:58,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 17:31:58,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765203157] [2022-01-18 17:31:58,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:31:58,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-18 17:31:58,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-18 17:31:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-18 17:31:58,678 INFO L87 Difference]: Start difference. First operand 154 states and 296 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:58,753 INFO L93 Difference]: Finished difference Result 212 states and 411 transitions. [2022-01-18 17:31:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 17:31:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-01-18 17:31:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:58,754 INFO L225 Difference]: With dead ends: 212 [2022-01-18 17:31:58,754 INFO L226 Difference]: Without dead ends: 212 [2022-01-18 17:31:58,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 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 17:31:58,755 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:58,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 162 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 17:31:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-18 17:31:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 168. [2022-01-18 17:31:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.9880239520958083) internal successors, (332), 167 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 332 transitions. [2022-01-18 17:31:58,760 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 332 transitions. Word has length 25 [2022-01-18 17:31:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:58,760 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 332 transitions. [2022-01-18 17:31:58,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:58,760 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 332 transitions. [2022-01-18 17:31:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 17:31:58,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:58,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:58,781 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 17:31:58,975 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 17:31:58,975 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1932903841, now seen corresponding path program 12 times [2022-01-18 17:31:58,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:58,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030331037] [2022-01-18 17:31:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:58,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:58,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:59,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030331037] [2022-01-18 17:31:59,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030331037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 17:31:59,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 17:31:59,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 17:31:59,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051116819] [2022-01-18 17:31:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 17:31:59,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 17:31:59,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:31:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 17:31:59,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:31:59,001 INFO L87 Difference]: Start difference. First operand 168 states and 332 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:31:59,020 INFO L93 Difference]: Finished difference Result 416 states and 813 transitions. [2022-01-18 17:31:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 17:31:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 17:31:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:31:59,021 INFO L225 Difference]: With dead ends: 416 [2022-01-18 17:31:59,021 INFO L226 Difference]: Without dead ends: 372 [2022-01-18 17:31:59,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 17:31:59,022 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:31:59,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 17:31:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-18 17:31:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 330. [2022-01-18 17:31:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.0395136778115504) internal successors, (671), 329 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 671 transitions. [2022-01-18 17:31:59,032 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 671 transitions. Word has length 26 [2022-01-18 17:31:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:31:59,032 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 671 transitions. [2022-01-18 17:31:59,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:31:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 671 transitions. [2022-01-18 17:31:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:31:59,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:31:59,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:31:59,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 17:31:59,035 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:31:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:31:59,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2125140257, now seen corresponding path program 2 times [2022-01-18 17:31:59,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:31:59,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478571621] [2022-01-18 17:31:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:31:59,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:31:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:31:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:31:59,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:31:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478571621] [2022-01-18 17:31:59,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478571621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:31:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831002284] [2022-01-18 17:31:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:31:59,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:31:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:31:59,432 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 17:31:59,441 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 17:31:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:31:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:31:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:31:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:31:59,704 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 17:32:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:00,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:00,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:00,507 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 24 treesize of output 26 [2022-01-18 17:32:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:00,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831002284] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:00,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:00,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2022-01-18 17:32:00,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764460039] [2022-01-18 17:32:00,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:00,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 17:32:00,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 17:32:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:32:00,608 INFO L87 Difference]: Start difference. First operand 330 states and 671 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 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 17:32:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:02,282 INFO L93 Difference]: Finished difference Result 670 states and 1321 transitions. [2022-01-18 17:32:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:32:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 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 30 [2022-01-18 17:32:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:02,285 INFO L225 Difference]: With dead ends: 670 [2022-01-18 17:32:02,286 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 17:32:02,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=335, Invalid=3697, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:32:02,289 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 206 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:02,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 479 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:32:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 17:32:02,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 355. [2022-01-18 17:32:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0141242937853105) internal successors, (713), 354 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 713 transitions. [2022-01-18 17:32:02,305 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 713 transitions. Word has length 30 [2022-01-18 17:32:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:02,305 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 713 transitions. [2022-01-18 17:32:02,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 41 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 17:32:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 713 transitions. [2022-01-18 17:32:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:02,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:02,306 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:02,331 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 17:32:02,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 17:32:02,528 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1190255993, now seen corresponding path program 3 times [2022-01-18 17:32:02,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:02,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338091927] [2022-01-18 17:32:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:02,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:02,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338091927] [2022-01-18 17:32:02,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338091927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447058824] [2022-01-18 17:32:02,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:32:02,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:02,897 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 17:32:02,897 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 17:32:02,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:32:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:03,122 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 17:32:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:03,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:03,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:03,958 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 24 treesize of output 26 [2022-01-18 17:32:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:04,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447058824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:04,044 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:04,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-18 17:32:04,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361523048] [2022-01-18 17:32:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:04,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:32:04,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:04,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:32:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1411, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:32:04,045 INFO L87 Difference]: Start difference. First operand 355 states and 713 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 17:32:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:05,926 INFO L93 Difference]: Finished difference Result 708 states and 1382 transitions. [2022-01-18 17:32:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:32:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 30 [2022-01-18 17:32:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:05,929 INFO L225 Difference]: With dead ends: 708 [2022-01-18 17:32:05,929 INFO L226 Difference]: Without dead ends: 699 [2022-01-18 17:32:05,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:32:05,931 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 173 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 2306 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:05,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 605 Invalid, 2379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:32:05,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-01-18 17:32:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 384. [2022-01-18 17:32:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0078328981723237) internal successors, (769), 383 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 769 transitions. [2022-01-18 17:32:05,944 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 769 transitions. Word has length 30 [2022-01-18 17:32:05,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:05,944 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 769 transitions. [2022-01-18 17:32:05,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 17:32:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 769 transitions. [2022-01-18 17:32:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:05,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:05,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:05,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-18 17:32:06,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-18 17:32:06,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash -308190269, now seen corresponding path program 4 times [2022-01-18 17:32:06,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:06,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846347655] [2022-01-18 17:32:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:06,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:06,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846347655] [2022-01-18 17:32:06,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846347655] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:06,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308477432] [2022-01-18 17:32:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:32:06,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:06,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:06,560 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 17:32:06,570 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 17:32:06,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:32:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:06,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:06,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:06,796 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 17:32:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:07,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:07,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:07,582 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 24 treesize of output 26 [2022-01-18 17:32:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:07,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308477432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:07,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:07,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-18 17:32:07,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284132491] [2022-01-18 17:32:07,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:07,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:32:07,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:32:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:32:07,668 INFO L87 Difference]: Start difference. First operand 384 states and 769 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 17:32:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:09,587 INFO L93 Difference]: Finished difference Result 575 states and 1126 transitions. [2022-01-18 17:32:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:32:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 30 [2022-01-18 17:32:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:09,590 INFO L225 Difference]: With dead ends: 575 [2022-01-18 17:32:09,590 INFO L226 Difference]: Without dead ends: 560 [2022-01-18 17:32:09,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=420, Invalid=4136, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:32:09,591 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 215 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:09,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 404 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:32:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-18 17:32:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 380. [2022-01-18 17:32:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0079155672823217) internal successors, (761), 379 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 761 transitions. [2022-01-18 17:32:09,601 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 761 transitions. Word has length 30 [2022-01-18 17:32:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:09,601 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 761 transitions. [2022-01-18 17:32:09,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 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 17:32:09,601 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 761 transitions. [2022-01-18 17:32:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:09,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:09,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:09,629 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 17:32:09,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:09,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:09,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1160476449, now seen corresponding path program 5 times [2022-01-18 17:32:09,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:09,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984916174] [2022-01-18 17:32:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:09,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:10,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984916174] [2022-01-18 17:32:10,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984916174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78139852] [2022-01-18 17:32:10,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:32:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:10,216 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 17:32:10,216 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 17:32:10,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:32:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:32:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:10,443 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 17:32:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:11,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:11,166 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 24 treesize of output 26 [2022-01-18 17:32:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:11,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78139852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:11,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:11,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2022-01-18 17:32:11,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768892193] [2022-01-18 17:32:11,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:11,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:32:11,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:32:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:32:11,277 INFO L87 Difference]: Start difference. First operand 380 states and 761 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 17:32:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:12,613 INFO L93 Difference]: Finished difference Result 731 states and 1429 transitions. [2022-01-18 17:32:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:32:12,614 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 30 [2022-01-18 17:32:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:12,616 INFO L225 Difference]: With dead ends: 731 [2022-01-18 17:32:12,616 INFO L226 Difference]: Without dead ends: 686 [2022-01-18 17:32:12,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=355, Invalid=3305, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:32:12,617 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:12,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 436 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:32:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-01-18 17:32:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 368. [2022-01-18 17:32:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.008174386920981) internal successors, (737), 367 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 737 transitions. [2022-01-18 17:32:12,628 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 737 transitions. Word has length 30 [2022-01-18 17:32:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:12,628 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 737 transitions. [2022-01-18 17:32:12,628 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 17:32:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 737 transitions. [2022-01-18 17:32:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:12,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:12,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:12,654 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 17:32:12,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 17:32:12,852 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -717883435, now seen corresponding path program 6 times [2022-01-18 17:32:12,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441109946] [2022-01-18 17:32:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:12,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:13,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441109946] [2022-01-18 17:32:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441109946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005465001] [2022-01-18 17:32:13,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:13,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:13,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:13,244 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 17:32:13,245 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 17:32:13,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:32:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:13,454 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 17:32:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:13,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:14,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:14,180 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 24 treesize of output 26 [2022-01-18 17:32:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:14,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005465001] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:14,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:14,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 39 [2022-01-18 17:32:14,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717691241] [2022-01-18 17:32:14,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:14,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-18 17:32:14,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-18 17:32:14,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 17:32:14,276 INFO L87 Difference]: Start difference. First operand 368 states and 737 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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 17:32:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:15,873 INFO L93 Difference]: Finished difference Result 735 states and 1433 transitions. [2022-01-18 17:32:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:32:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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 30 [2022-01-18 17:32:15,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:15,876 INFO L225 Difference]: With dead ends: 735 [2022-01-18 17:32:15,876 INFO L226 Difference]: Without dead ends: 702 [2022-01-18 17:32:15,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=3782, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:32:15,877 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 196 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:15,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 534 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:32:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-18 17:32:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2022-01-18 17:32:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.0082191780821916) internal successors, (733), 365 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 733 transitions. [2022-01-18 17:32:15,887 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 733 transitions. Word has length 30 [2022-01-18 17:32:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 733 transitions. [2022-01-18 17:32:15,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 39 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 17:32:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 733 transitions. [2022-01-18 17:32:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:15,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:15,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:15,913 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 17:32:16,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:16,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 265021255, now seen corresponding path program 7 times [2022-01-18 17:32:16,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:16,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211937077] [2022-01-18 17:32:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:16,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:16,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211937077] [2022-01-18 17:32:16,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211937077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:16,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178529943] [2022-01-18 17:32:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:32:16,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:16,452 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 17:32:16,453 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 17:32:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:16,676 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 17:32:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:16,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:17,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:17,463 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 24 treesize of output 26 [2022-01-18 17:32:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:17,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178529943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:17,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:17,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-01-18 17:32:17,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249354345] [2022-01-18 17:32:17,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:17,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:17,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:17,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:17,561 INFO L87 Difference]: Start difference. First operand 366 states and 733 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 17:32:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:19,298 INFO L93 Difference]: Finished difference Result 745 states and 1449 transitions. [2022-01-18 17:32:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:32:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 30 [2022-01-18 17:32:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:19,300 INFO L225 Difference]: With dead ends: 745 [2022-01-18 17:32:19,300 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 17:32:19,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=403, Invalid=4289, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:32:19,302 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 195 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 2099 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:19,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 586 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:32:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 17:32:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 364. [2022-01-18 17:32:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-01-18 17:32:19,311 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-01-18 17:32:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:19,311 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-01-18 17:32:19,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 17:32:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-01-18 17:32:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:19,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:19,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:19,334 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 17:32:19,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:19,527 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 103016025, now seen corresponding path program 8 times [2022-01-18 17:32:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:19,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882620335] [2022-01-18 17:32:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:19,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:19,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:19,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882620335] [2022-01-18 17:32:19,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882620335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:19,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298504992] [2022-01-18 17:32:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:32:19,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:19,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:19,894 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 17:32:19,896 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 17:32:19,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:32:19,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:19,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:20,139 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 17:32:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:20,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:20,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:20,904 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 24 treesize of output 26 [2022-01-18 17:32:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298504992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:21,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:21,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2022-01-18 17:32:21,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227025413] [2022-01-18 17:32:21,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:21,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:21,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:21,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1648, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:21,008 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 17:32:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:22,571 INFO L93 Difference]: Finished difference Result 702 states and 1377 transitions. [2022-01-18 17:32:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:32:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 30 [2022-01-18 17:32:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:22,574 INFO L225 Difference]: With dead ends: 702 [2022-01-18 17:32:22,574 INFO L226 Difference]: Without dead ends: 695 [2022-01-18 17:32:22,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=360, Invalid=3930, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:32:22,575 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:22,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 664 Invalid, 2112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:32:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-18 17:32:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 364. [2022-01-18 17:32:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.0110192837465566) internal successors, (730), 363 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 730 transitions. [2022-01-18 17:32:22,584 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 730 transitions. Word has length 30 [2022-01-18 17:32:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:22,584 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 730 transitions. [2022-01-18 17:32:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 42 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 17:32:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 730 transitions. [2022-01-18 17:32:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:22,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:22,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:22,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-18 17:32:22,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:22,800 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash 790273287, now seen corresponding path program 9 times [2022-01-18 17:32:22,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:22,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688709740] [2022-01-18 17:32:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:22,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:23,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688709740] [2022-01-18 17:32:23,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688709740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084049277] [2022-01-18 17:32:23,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:32:23,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:23,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:23,148 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 17:32:23,148 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 17:32:23,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:32:23,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:23,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:32:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:23,372 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 17:32:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:23,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:24,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:24,158 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 24 treesize of output 26 [2022-01-18 17:32:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:24,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084049277] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:24,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:24,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:32:24,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042672810] [2022-01-18 17:32:24,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:24,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:24,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:24,260 INFO L87 Difference]: Start difference. First operand 364 states and 730 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:27,429 INFO L93 Difference]: Finished difference Result 873 states and 1711 transitions. [2022-01-18 17:32:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 17:32:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:32:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:27,431 INFO L225 Difference]: With dead ends: 873 [2022-01-18 17:32:27,431 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 17:32:27,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=925, Invalid=7817, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:32:27,433 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 359 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:27,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 410 Invalid, 2574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:32:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 17:32:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 386. [2022-01-18 17:32:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.0233766233766235) internal successors, (779), 385 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 779 transitions. [2022-01-18 17:32:27,442 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 779 transitions. Word has length 30 [2022-01-18 17:32:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:27,443 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 779 transitions. [2022-01-18 17:32:27,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:27,443 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 779 transitions. [2022-01-18 17:32:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:27,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:27,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:27,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-18 17:32:27,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:27,660 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:27,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1672339011, now seen corresponding path program 10 times [2022-01-18 17:32:27,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:27,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520931723] [2022-01-18 17:32:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:27,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:27,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520931723] [2022-01-18 17:32:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520931723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:27,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776252719] [2022-01-18 17:32:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:32:27,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:28,000 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 17:32:28,004 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 17:32:28,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:32:28,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:28,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:28,218 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 17:32:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:28,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:29,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:29,008 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 24 treesize of output 26 [2022-01-18 17:32:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776252719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:29,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:29,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:32:29,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697339886] [2022-01-18 17:32:29,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:29,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:29,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:29,092 INFO L87 Difference]: Start difference. First operand 386 states and 779 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:32,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:32,579 INFO L93 Difference]: Finished difference Result 727 states and 1429 transitions. [2022-01-18 17:32:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:32:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:32:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:32,581 INFO L225 Difference]: With dead ends: 727 [2022-01-18 17:32:32,581 INFO L226 Difference]: Without dead ends: 712 [2022-01-18 17:32:32,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=948, Invalid=7608, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 17:32:32,582 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:32,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 400 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:32:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-18 17:32:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 384. [2022-01-18 17:32:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.023498694516971) internal successors, (775), 383 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 775 transitions. [2022-01-18 17:32:32,589 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 775 transitions. Word has length 30 [2022-01-18 17:32:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:32,590 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 775 transitions. [2022-01-18 17:32:32,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 775 transitions. [2022-01-18 17:32:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:32,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:32,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:32,608 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 17:32:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 17:32:32,799 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1153961567, now seen corresponding path program 11 times [2022-01-18 17:32:32,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647865840] [2022-01-18 17:32:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:32,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:33,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647865840] [2022-01-18 17:32:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647865840] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112227683] [2022-01-18 17:32:33,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:32:33,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:33,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:33,164 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 17:32:33,165 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 17:32:33,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:32:33,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:32:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:33,390 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 17:32:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:33,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:34,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:34,242 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 24 treesize of output 26 [2022-01-18 17:32:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:34,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112227683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:34,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:34,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:32:34,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002421258] [2022-01-18 17:32:34,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:34,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:32:34,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:34,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:32:34,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:32:34,332 INFO L87 Difference]: Start difference. First operand 384 states and 775 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:37,631 INFO L93 Difference]: Finished difference Result 800 states and 1548 transitions. [2022-01-18 17:32:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:32:37,632 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:32:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:37,634 INFO L225 Difference]: With dead ends: 800 [2022-01-18 17:32:37,634 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 17:32:37,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=974, Invalid=8338, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 17:32:37,636 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 363 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:37,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 536 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2472 Invalid, 0 Unknown, 112 Unchecked, 1.0s Time] [2022-01-18 17:32:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 17:32:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 408. [2022-01-18 17:32:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.0) internal successors, (814), 407 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 814 transitions. [2022-01-18 17:32:37,644 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 814 transitions. Word has length 30 [2022-01-18 17:32:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:37,644 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 814 transitions. [2022-01-18 17:32:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 814 transitions. [2022-01-18 17:32:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:37,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:37,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:37,667 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 17:32:37,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-18 17:32:37,863 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:37,864 INFO L85 PathProgramCache]: Analyzing trace with hash -176520031, now seen corresponding path program 12 times [2022-01-18 17:32:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083939681] [2022-01-18 17:32:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:38,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083939681] [2022-01-18 17:32:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083939681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84478028] [2022-01-18 17:32:38,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:32:38,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:38,268 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 17:32:38,298 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 17:32:38,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:32:38,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:38,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:32:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:38,492 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 17:32:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:38,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:39,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:39,322 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 24 treesize of output 26 [2022-01-18 17:32:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84478028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:39,444 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:39,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:32:39,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101028232] [2022-01-18 17:32:39,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:39,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:32:39,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:39,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:32:39,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:32:39,446 INFO L87 Difference]: Start difference. First operand 408 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:42,894 INFO L93 Difference]: Finished difference Result 928 states and 1802 transitions. [2022-01-18 17:32:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-18 17:32:42,894 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:32:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:42,896 INFO L225 Difference]: With dead ends: 928 [2022-01-18 17:32:42,896 INFO L226 Difference]: Without dead ends: 886 [2022-01-18 17:32:42,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2718 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1003, Invalid=8503, Unknown=0, NotChecked=0, Total=9506 [2022-01-18 17:32:42,897 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 351 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:42,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 547 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2390 Invalid, 0 Unknown, 103 Unchecked, 1.0s Time] [2022-01-18 17:32:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-18 17:32:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 386. [2022-01-18 17:32:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.005194805194805) internal successors, (772), 385 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 772 transitions. [2022-01-18 17:32:42,907 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 772 transitions. Word has length 30 [2022-01-18 17:32:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:42,908 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 772 transitions. [2022-01-18 17:32:42,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 772 transitions. [2022-01-18 17:32:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:42,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:42,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:42,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-18 17:32:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:43,131 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash -265343177, now seen corresponding path program 13 times [2022-01-18 17:32:43,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30111440] [2022-01-18 17:32:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:43,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:43,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30111440] [2022-01-18 17:32:43,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30111440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305660060] [2022-01-18 17:32:43,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:32:43,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:43,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:43,498 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 17:32:43,499 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 17:32:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:43,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:43,711 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 17:32:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:44,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:44,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:44,477 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 24 treesize of output 26 [2022-01-18 17:32:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:44,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305660060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:44,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:44,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:32:44,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669227670] [2022-01-18 17:32:44,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:44,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:44,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:44,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:44,589 INFO L87 Difference]: Start difference. First operand 386 states and 772 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:47,006 INFO L93 Difference]: Finished difference Result 758 states and 1487 transitions. [2022-01-18 17:32:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:32:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:32:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:47,008 INFO L225 Difference]: With dead ends: 758 [2022-01-18 17:32:47,008 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 17:32:47,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=653, Invalid=5827, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:32:47,009 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 261 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:47,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 470 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:32:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 17:32:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 388. [2022-01-18 17:32:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0025839793281652) internal successors, (775), 387 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 775 transitions. [2022-01-18 17:32:47,020 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 775 transitions. Word has length 30 [2022-01-18 17:32:47,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:47,020 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 775 transitions. [2022-01-18 17:32:47,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:47,020 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 775 transitions. [2022-01-18 17:32:47,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:47,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:47,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:47,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:47,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:47,243 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash 616722547, now seen corresponding path program 14 times [2022-01-18 17:32:47,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:47,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073277818] [2022-01-18 17:32:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:47,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:47,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073277818] [2022-01-18 17:32:47,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073277818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745889776] [2022-01-18 17:32:47,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:32:47,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:47,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:47,591 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 17:32:47,591 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 17:32:47,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:32:47,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:47,810 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 17:32:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:48,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:48,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:48,719 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 24 treesize of output 26 [2022-01-18 17:32:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:48,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745889776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:48,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:48,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:32:48,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548644569] [2022-01-18 17:32:48,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:48,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:48,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:48,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:48,811 INFO L87 Difference]: Start difference. First operand 388 states and 775 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:51,576 INFO L93 Difference]: Finished difference Result 628 states and 1232 transitions. [2022-01-18 17:32:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:32:51,576 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:32:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:51,578 INFO L225 Difference]: With dead ends: 628 [2022-01-18 17:32:51,578 INFO L226 Difference]: Without dead ends: 595 [2022-01-18 17:32:51,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=713, Invalid=6093, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:32:51,579 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 309 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:51,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 472 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2196 Invalid, 0 Unknown, 71 Unchecked, 0.9s Time] [2022-01-18 17:32:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-18 17:32:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 378. [2022-01-18 17:32:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.0159151193633953) internal successors, (760), 377 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 760 transitions. [2022-01-18 17:32:51,586 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 760 transitions. Word has length 30 [2022-01-18 17:32:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:51,586 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 760 transitions. [2022-01-18 17:32:51,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 760 transitions. [2022-01-18 17:32:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:51,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:51,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:51,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:51,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 17:32:51,807 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -261285103, now seen corresponding path program 15 times [2022-01-18 17:32:51,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:51,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994207819] [2022-01-18 17:32:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:51,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:52,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:52,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994207819] [2022-01-18 17:32:52,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994207819] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482544582] [2022-01-18 17:32:52,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:32:52,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:52,123 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 17:32:52,123 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 17:32:52,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:32:52,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:52,313 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 17:32:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:53,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:53,136 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 24 treesize of output 26 [2022-01-18 17:32:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:53,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482544582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:53,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:53,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 17:32:53,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879766595] [2022-01-18 17:32:53,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:53,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:32:53,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:32:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:32:53,220 INFO L87 Difference]: Start difference. First operand 378 states and 760 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:55,437 INFO L93 Difference]: Finished difference Result 770 states and 1520 transitions. [2022-01-18 17:32:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:32:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:32:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:55,440 INFO L225 Difference]: With dead ends: 770 [2022-01-18 17:32:55,440 INFO L226 Difference]: Without dead ends: 737 [2022-01-18 17:32:55,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=609, Invalid=5243, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 17:32:55,441 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 244 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:55,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 465 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:32:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-18 17:32:55,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 376. [2022-01-18 17:32:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.018666666666667) internal successors, (757), 375 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 757 transitions. [2022-01-18 17:32:55,447 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 757 transitions. Word has length 30 [2022-01-18 17:32:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:55,447 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 757 transitions. [2022-01-18 17:32:55,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 757 transitions. [2022-01-18 17:32:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:55,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:55,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:55,468 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 17:32:55,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 17:32:55,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash 224852401, now seen corresponding path program 16 times [2022-01-18 17:32:55,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:55,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973611036] [2022-01-18 17:32:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:55,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:32:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:56,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:32:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973611036] [2022-01-18 17:32:56,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973611036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:32:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031537071] [2022-01-18 17:32:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:32:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:32:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:32:56,003 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 17:32:56,003 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 17:32:56,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:32:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:32:56,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:32:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:32:56,230 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 17:32:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:56,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:32:56,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:32:56,999 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 24 treesize of output 26 [2022-01-18 17:32:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:32:57,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031537071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:32:57,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:32:57,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:32:57,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811831120] [2022-01-18 17:32:57,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:32:57,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:32:57,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:32:57,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:32:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:32:57,084 INFO L87 Difference]: Start difference. First operand 376 states and 757 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:32:59,510 INFO L93 Difference]: Finished difference Result 768 states and 1506 transitions. [2022-01-18 17:32:59,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:32:59,510 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:32:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:32:59,513 INFO L225 Difference]: With dead ends: 768 [2022-01-18 17:32:59,513 INFO L226 Difference]: Without dead ends: 759 [2022-01-18 17:32:59,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=609, Invalid=6033, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:32:59,514 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 263 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 2019 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:32:59,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 446 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:32:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-18 17:32:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 391. [2022-01-18 17:32:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0153846153846153) internal successors, (786), 390 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 786 transitions. [2022-01-18 17:32:59,533 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 786 transitions. Word has length 30 [2022-01-18 17:32:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:32:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 786 transitions. [2022-01-18 17:32:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:32:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 786 transitions. [2022-01-18 17:32:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:32:59,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:32:59,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:32:59,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 17:32:59,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 17:32:59,747 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:32:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:32:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1106918125, now seen corresponding path program 17 times [2022-01-18 17:32:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:32:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282972718] [2022-01-18 17:32:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:32:59,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:32:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282972718] [2022-01-18 17:33:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282972718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:00,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212782040] [2022-01-18 17:33:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:00,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:00,137 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 17:33:00,138 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 17:33:00,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:00,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:00,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:00,354 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 17:33:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:00,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:01,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:01,139 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 24 treesize of output 26 [2022-01-18 17:33:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212782040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:01,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:01,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:01,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562887210] [2022-01-18 17:33:01,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:01,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:01,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:01,227 INFO L87 Difference]: Start difference. First operand 391 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:04,050 INFO L93 Difference]: Finished difference Result 660 states and 1303 transitions. [2022-01-18 17:33:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:33:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:33:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:04,052 INFO L225 Difference]: With dead ends: 660 [2022-01-18 17:33:04,052 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 17:33:04,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=653, Invalid=5989, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:33:04,054 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 284 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:04,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 497 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:33:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 17:33:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 389. [2022-01-18 17:33:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.015463917525773) internal successors, (782), 388 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 782 transitions. [2022-01-18 17:33:04,061 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 782 transitions. Word has length 30 [2022-01-18 17:33:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:04,062 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 782 transitions. [2022-01-18 17:33:04,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 782 transitions. [2022-01-18 17:33:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:04,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:04,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:04,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-18 17:33:04,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:04,285 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1719382453, now seen corresponding path program 18 times [2022-01-18 17:33:04,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:04,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571974208] [2022-01-18 17:33:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:04,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:04,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:04,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571974208] [2022-01-18 17:33:04,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571974208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:04,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515906687] [2022-01-18 17:33:04,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:04,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:04,626 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 17:33:04,627 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 17:33:04,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:33:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:04,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:04,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:04,835 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 17:33:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:05,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:05,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:05,559 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 24 treesize of output 26 [2022-01-18 17:33:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:05,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515906687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:05,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:05,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:33:05,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711100294] [2022-01-18 17:33:05,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:05,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:33:05,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:33:05,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:33:05,658 INFO L87 Difference]: Start difference. First operand 389 states and 782 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:08,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:08,124 INFO L93 Difference]: Finished difference Result 783 states and 1542 transitions. [2022-01-18 17:33:08,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:33:08,124 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:08,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:08,126 INFO L225 Difference]: With dead ends: 783 [2022-01-18 17:33:08,126 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 17:33:08,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=615, Invalid=5547, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:33:08,126 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 270 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:08,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 449 Invalid, 2007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 17:33:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 381. [2022-01-18 17:33:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-01-18 17:33:08,133 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-01-18 17:33:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:08,133 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-01-18 17:33:08,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-01-18 17:33:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:08,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:08,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:08,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:08,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:08,355 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 228910475, now seen corresponding path program 19 times [2022-01-18 17:33:08,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:08,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998764731] [2022-01-18 17:33:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:08,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:08,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998764731] [2022-01-18 17:33:08,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998764731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531904379] [2022-01-18 17:33:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:08,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:08,661 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 17:33:08,662 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 17:33:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:08,853 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 17:33:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:09,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:09,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:09,617 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 24 treesize of output 26 [2022-01-18 17:33:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531904379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:09,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 17:33:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351606640] [2022-01-18 17:33:09,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:33:09,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:33:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:33:09,713 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:11,810 INFO L93 Difference]: Finished difference Result 766 states and 1511 transitions. [2022-01-18 17:33:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:33:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:11,812 INFO L225 Difference]: With dead ends: 766 [2022-01-18 17:33:11,812 INFO L226 Difference]: Without dead ends: 733 [2022-01-18 17:33:11,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=564, Invalid=5288, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 17:33:11,813 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:11,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 404 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:33:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-18 17:33:11,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 379. [2022-01-18 17:33:11,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.015873015873016) internal successors, (762), 378 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 762 transitions. [2022-01-18 17:33:11,820 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 762 transitions. Word has length 30 [2022-01-18 17:33:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:11,820 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 762 transitions. [2022-01-18 17:33:11,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 762 transitions. [2022-01-18 17:33:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:11,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:11,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:11,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 17:33:12,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:12,022 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2110598265, now seen corresponding path program 20 times [2022-01-18 17:33:12,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:12,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174266151] [2022-01-18 17:33:12,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:12,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:12,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174266151] [2022-01-18 17:33:12,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174266151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066514869] [2022-01-18 17:33:12,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:12,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:12,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:12,347 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 17:33:12,348 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 17:33:12,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:12,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:12,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:12,541 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 17:33:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:12,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:13,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:13,413 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 24 treesize of output 26 [2022-01-18 17:33:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:13,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066514869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:13,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:13,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-01-18 17:33:13,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86378531] [2022-01-18 17:33:13,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 17:33:13,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 17:33:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:33:13,513 INFO L87 Difference]: Start difference. First operand 379 states and 762 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:15,946 INFO L93 Difference]: Finished difference Result 767 states and 1512 transitions. [2022-01-18 17:33:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:33:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:15,948 INFO L225 Difference]: With dead ends: 767 [2022-01-18 17:33:15,948 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 17:33:15,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=589, Invalid=5891, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:33:15,949 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:15,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 629 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:33:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 17:33:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 377. [2022-01-18 17:33:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-01-18 17:33:15,955 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-01-18 17:33:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:15,956 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-01-18 17:33:15,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-01-18 17:33:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:15,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:15,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:15,971 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 17:33:16,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-01-18 17:33:16,157 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1453752901, now seen corresponding path program 21 times [2022-01-18 17:33:16,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:16,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917450662] [2022-01-18 17:33:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:16,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:16,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:16,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917450662] [2022-01-18 17:33:16,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917450662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:16,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054560511] [2022-01-18 17:33:16,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:33:16,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:16,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:16,534 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 17:33:16,534 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 17:33:16,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:33:16,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:16,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:16,779 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 17:33:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:17,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:17,530 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 24 treesize of output 26 [2022-01-18 17:33:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:17,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054560511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:17,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:17,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:17,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568036807] [2022-01-18 17:33:17,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:17,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:17,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:17,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:17,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:17,617 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:19,881 INFO L93 Difference]: Finished difference Result 771 states and 1503 transitions. [2022-01-18 17:33:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:33:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:33:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:19,883 INFO L225 Difference]: With dead ends: 771 [2022-01-18 17:33:19,883 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 17:33:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=568, Invalid=5752, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:33:19,884 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 2141 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 515 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2141 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 17:33:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 406. [2022-01-18 17:33:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-01-18 17:33:19,891 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-01-18 17:33:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:19,892 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-01-18 17:33:19,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-01-18 17:33:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:19,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:19,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:19,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:20,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:20,108 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -571687177, now seen corresponding path program 22 times [2022-01-18 17:33:20,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:20,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965751289] [2022-01-18 17:33:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:20,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965751289] [2022-01-18 17:33:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965751289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752830120] [2022-01-18 17:33:20,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:33:20,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:20,459 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 17:33:20,460 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 17:33:20,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:33:20,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:20,701 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 17:33:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:20,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:21,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:21,478 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 24 treesize of output 26 [2022-01-18 17:33:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752830120] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:21,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:21,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:21,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240179519] [2022-01-18 17:33:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:21,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:21,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:21,576 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:24,136 INFO L93 Difference]: Finished difference Result 632 states and 1237 transitions. [2022-01-18 17:33:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:33:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:33:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:24,139 INFO L225 Difference]: With dead ends: 632 [2022-01-18 17:33:24,139 INFO L226 Difference]: Without dead ends: 617 [2022-01-18 17:33:24,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=614, Invalid=5866, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:33:24,140 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:24,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 454 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:33:24,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-01-18 17:33:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 402. [2022-01-18 17:33:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-01-18 17:33:24,145 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-01-18 17:33:24,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:24,145 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-01-18 17:33:24,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-01-18 17:33:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:24,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:24,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:24,162 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 17:33:24,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:24,347 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 896979541, now seen corresponding path program 23 times [2022-01-18 17:33:24,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:24,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792492298] [2022-01-18 17:33:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:24,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:24,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792492298] [2022-01-18 17:33:24,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792492298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447916717] [2022-01-18 17:33:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:24,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:24,704 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 17:33:24,705 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 17:33:24,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:24,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:33:24,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:24,941 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 17:33:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:25,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:25,716 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:25,717 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 24 treesize of output 26 [2022-01-18 17:33:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:25,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447916717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:25,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:25,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:33:25,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380325305] [2022-01-18 17:33:25,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:25,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:33:25,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:33:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:33:25,798 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:27,741 INFO L93 Difference]: Finished difference Result 794 states and 1550 transitions. [2022-01-18 17:33:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:33:27,741 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:27,744 INFO L225 Difference]: With dead ends: 794 [2022-01-18 17:33:27,744 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 17:33:27,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=541, Invalid=4861, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:33:27,745 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 227 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:27,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 432 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1576 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2022-01-18 17:33:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 17:33:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 389. [2022-01-18 17:33:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0128865979381443) internal successors, (781), 388 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 781 transitions. [2022-01-18 17:33:27,751 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 781 transitions. Word has length 30 [2022-01-18 17:33:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:27,751 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 781 transitions. [2022-01-18 17:33:27,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 781 transitions. [2022-01-18 17:33:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:27,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:27,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:27,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 17:33:27,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 17:33:27,967 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:27,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:27,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1449694827, now seen corresponding path program 24 times [2022-01-18 17:33:27,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:27,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302887237] [2022-01-18 17:33:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:27,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:28,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302887237] [2022-01-18 17:33:28,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302887237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031106199] [2022-01-18 17:33:28,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:28,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:28,277 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 17:33:28,278 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 17:33:28,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:33:28,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:28,497 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 17:33:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:28,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:29,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:29,227 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 24 treesize of output 26 [2022-01-18 17:33:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:29,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031106199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:29,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:29,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-01-18 17:33:29,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815644320] [2022-01-18 17:33:29,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:29,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:33:29,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:33:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:33:29,312 INFO L87 Difference]: Start difference. First operand 389 states and 781 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:31,250 INFO L93 Difference]: Finished difference Result 798 states and 1554 transitions. [2022-01-18 17:33:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:33:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:31,253 INFO L225 Difference]: With dead ends: 798 [2022-01-18 17:33:31,253 INFO L226 Difference]: Without dead ends: 765 [2022-01-18 17:33:31,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=522, Invalid=5028, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:33:31,254 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 255 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:31,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 432 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:33:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-01-18 17:33:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 386. [2022-01-18 17:33:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.012987012987013) internal successors, (775), 385 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 775 transitions. [2022-01-18 17:33:31,260 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 775 transitions. Word has length 30 [2022-01-18 17:33:31,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:31,260 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 775 transitions. [2022-01-18 17:33:31,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:31,260 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 775 transitions. [2022-01-18 17:33:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:31,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:31,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:31,276 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 17:33:31,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 17:33:31,461 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:31,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:31,462 INFO L85 PathProgramCache]: Analyzing trace with hash 505763729, now seen corresponding path program 25 times [2022-01-18 17:33:31,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:31,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649697411] [2022-01-18 17:33:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:31,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:31,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649697411] [2022-01-18 17:33:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649697411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469555528] [2022-01-18 17:33:31,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:31,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:31,801 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 17:33:31,801 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 17:33:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:31,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:31,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:32,056 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 17:33:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:32,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:32,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:32,874 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 24 treesize of output 26 [2022-01-18 17:33:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469555528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:32,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:32,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-01-18 17:33:32,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835732224] [2022-01-18 17:33:32,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:32,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-18 17:33:32,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-18 17:33:32,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 17:33:32,976 INFO L87 Difference]: Start difference. First operand 386 states and 775 transitions. Second operand has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:35,099 INFO L93 Difference]: Finished difference Result 808 states and 1570 transitions. [2022-01-18 17:33:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:33:35,100 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:35,102 INFO L225 Difference]: With dead ends: 808 [2022-01-18 17:33:35,102 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 17:33:35,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=547, Invalid=5615, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:33:35,103 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 221 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:35,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 541 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 17:33:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 383. [2022-01-18 17:33:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0157068062827226) internal successors, (770), 382 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 770 transitions. [2022-01-18 17:33:35,113 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 770 transitions. Word has length 30 [2022-01-18 17:33:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:35,113 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 770 transitions. [2022-01-18 17:33:35,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 43 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 770 transitions. [2022-01-18 17:33:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:35,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:35,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:35,132 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 17:33:35,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 17:33:35,315 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash 22360469, now seen corresponding path program 26 times [2022-01-18 17:33:35,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:35,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681255452] [2022-01-18 17:33:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:35,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:35,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681255452] [2022-01-18 17:33:35,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681255452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:35,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738588389] [2022-01-18 17:33:35,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:35,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:35,682 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 17:33:35,683 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 17:33:35,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:35,951 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 17:33:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:36,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:36,908 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 29 [2022-01-18 17:33:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:37,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738588389] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:37,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:37,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2022-01-18 17:33:37,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182891578] [2022-01-18 17:33:37,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:37,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-18 17:33:37,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-18 17:33:37,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2058, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 17:33:37,023 INFO L87 Difference]: Start difference. First operand 383 states and 770 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:39,514 INFO L93 Difference]: Finished difference Result 760 states and 1483 transitions. [2022-01-18 17:33:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:33:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:39,517 INFO L225 Difference]: With dead ends: 760 [2022-01-18 17:33:39,517 INFO L226 Difference]: Without dead ends: 753 [2022-01-18 17:33:39,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=574, Invalid=6232, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:33:39,518 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 211 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:39,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 813 Invalid, 2991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 17:33:39,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-18 17:33:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 377. [2022-01-18 17:33:39,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.018617021276596) internal successors, (759), 376 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 759 transitions. [2022-01-18 17:33:39,526 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 759 transitions. Word has length 30 [2022-01-18 17:33:39,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:39,526 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 759 transitions. [2022-01-18 17:33:39,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 47 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 759 transitions. [2022-01-18 17:33:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:39,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:39,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:39,553 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 17:33:39,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 17:33:39,749 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 630707147, now seen corresponding path program 27 times [2022-01-18 17:33:39,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:39,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48414760] [2022-01-18 17:33:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:39,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:40,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48414760] [2022-01-18 17:33:40,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48414760] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348372224] [2022-01-18 17:33:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:33:40,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:40,089 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 17:33:40,090 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 17:33:40,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:33:40,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:40,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:33:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:40,281 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 17:33:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:40,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:41,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:41,071 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 24 treesize of output 26 [2022-01-18 17:33:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:41,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348372224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:41,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:41,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:41,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882791973] [2022-01-18 17:33:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:41,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:41,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:41,187 INFO L87 Difference]: Start difference. First operand 377 states and 759 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:43,075 INFO L93 Difference]: Finished difference Result 772 states and 1521 transitions. [2022-01-18 17:33:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:33:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:43,077 INFO L225 Difference]: With dead ends: 772 [2022-01-18 17:33:43,077 INFO L226 Difference]: Without dead ends: 763 [2022-01-18 17:33:43,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=485, Invalid=4771, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:33:43,078 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 160 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:43,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 494 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-18 17:33:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 394. [2022-01-18 17:33:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.015267175572519) internal successors, (792), 393 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 792 transitions. [2022-01-18 17:33:43,084 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 792 transitions. Word has length 30 [2022-01-18 17:33:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:43,084 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 792 transitions. [2022-01-18 17:33:43,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 792 transitions. [2022-01-18 17:33:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:43,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:43,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:43,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:43,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 17:33:43,286 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1512772871, now seen corresponding path program 28 times [2022-01-18 17:33:43,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:43,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503662306] [2022-01-18 17:33:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:43,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:43,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503662306] [2022-01-18 17:33:43,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503662306] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11714931] [2022-01-18 17:33:43,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:33:43,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:43,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:43,639 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 17:33:43,640 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 17:33:43,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:33:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:43,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:43,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:43,842 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 17:33:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:44,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:44,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:44,661 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 24 treesize of output 26 [2022-01-18 17:33:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:44,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11714931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:44,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:44,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:44,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581859498] [2022-01-18 17:33:44,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:44,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:44,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:44,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:44,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:44,754 INFO L87 Difference]: Start difference. First operand 394 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:46,934 INFO L93 Difference]: Finished difference Result 846 states and 1686 transitions. [2022-01-18 17:33:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:33:46,935 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:46,936 INFO L225 Difference]: With dead ends: 846 [2022-01-18 17:33:46,936 INFO L226 Difference]: Without dead ends: 829 [2022-01-18 17:33:46,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=569, Invalid=5131, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:33:46,936 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:46,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 519 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2185 Invalid, 0 Unknown, 106 Unchecked, 0.8s Time] [2022-01-18 17:33:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-01-18 17:33:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 392. [2022-01-18 17:33:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0153452685421995) internal successors, (788), 391 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 788 transitions. [2022-01-18 17:33:46,945 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 788 transitions. Word has length 30 [2022-01-18 17:33:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:46,945 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 788 transitions. [2022-01-18 17:33:46,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 788 transitions. [2022-01-18 17:33:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:46,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:46,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:46,962 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 17:33:47,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-01-18 17:33:47,151 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1313527707, now seen corresponding path program 29 times [2022-01-18 17:33:47,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616409820] [2022-01-18 17:33:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:47,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:47,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616409820] [2022-01-18 17:33:47,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616409820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:47,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201563248] [2022-01-18 17:33:47,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:33:47,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:47,486 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 17:33:47,487 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 17:33:47,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:33:47,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:47,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:33:47,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:47,668 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 17:33:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:48,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:48,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:48,509 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 24 treesize of output 26 [2022-01-18 17:33:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:48,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201563248] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:48,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:48,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:33:48,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463770377] [2022-01-18 17:33:48,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:48,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:33:48,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:33:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:33:48,599 INFO L87 Difference]: Start difference. First operand 392 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:50,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:50,416 INFO L93 Difference]: Finished difference Result 797 states and 1567 transitions. [2022-01-18 17:33:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:33:50,417 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:50,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:50,418 INFO L225 Difference]: With dead ends: 797 [2022-01-18 17:33:50,418 INFO L226 Difference]: Without dead ends: 760 [2022-01-18 17:33:50,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=498, Invalid=4614, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:33:50,419 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 191 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:50,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 487 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1726 Invalid, 0 Unknown, 56 Unchecked, 0.7s Time] [2022-01-18 17:33:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-18 17:33:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 390. [2022-01-18 17:33:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0154241645244215) internal successors, (784), 389 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 784 transitions. [2022-01-18 17:33:50,427 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 784 transitions. Word has length 30 [2022-01-18 17:33:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:50,427 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 784 transitions. [2022-01-18 17:33:50,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 784 transitions. [2022-01-18 17:33:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:50,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:50,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:50,443 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 17:33:50,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-01-18 17:33:50,628 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -391825567, now seen corresponding path program 30 times [2022-01-18 17:33:50,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878525137] [2022-01-18 17:33:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:50,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:50,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878525137] [2022-01-18 17:33:50,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878525137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028315545] [2022-01-18 17:33:50,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:33:50,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:50,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:50,997 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 17:33:50,997 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 17:33:51,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:33:51,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:51,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:33:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:51,185 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 17:33:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:51,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:52,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:52,001 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 24 treesize of output 26 [2022-01-18 17:33:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:52,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028315545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:52,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:52,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:52,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116823759] [2022-01-18 17:33:52,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:52,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:52,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:52,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:52,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:52,090 INFO L87 Difference]: Start difference. First operand 390 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:53,661 INFO L93 Difference]: Finished difference Result 776 states and 1535 transitions. [2022-01-18 17:33:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:33:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:53,663 INFO L225 Difference]: With dead ends: 776 [2022-01-18 17:33:53,663 INFO L226 Difference]: Without dead ends: 733 [2022-01-18 17:33:53,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=477, Invalid=4493, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:33:53,664 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:53,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1500 Invalid, 0 Unknown, 202 Unchecked, 0.6s Time] [2022-01-18 17:33:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-18 17:33:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 381. [2022-01-18 17:33:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-01-18 17:33:53,670 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-01-18 17:33:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:53,670 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-01-18 17:33:53,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-01-18 17:33:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:53,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:53,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:53,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-18 17:33:53,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 17:33:53,872 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1666851087, now seen corresponding path program 31 times [2022-01-18 17:33:53,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:53,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481589948] [2022-01-18 17:33:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:53,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:54,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481589948] [2022-01-18 17:33:54,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481589948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739105381] [2022-01-18 17:33:54,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:33:54,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:54,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:54,234 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 17:33:54,235 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 17:33:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:54,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:54,431 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 17:33:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:55,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:55,222 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 24 treesize of output 26 [2022-01-18 17:33:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739105381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:55,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:55,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:33:55,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939568902] [2022-01-18 17:33:55,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:55,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:33:55,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:33:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:33:55,318 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:33:57,575 INFO L93 Difference]: Finished difference Result 849 states and 1671 transitions. [2022-01-18 17:33:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:33:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:33:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:33:57,577 INFO L225 Difference]: With dead ends: 849 [2022-01-18 17:33:57,577 INFO L226 Difference]: Without dead ends: 840 [2022-01-18 17:33:57,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=614, Invalid=5706, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:33:57,577 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 219 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:33:57,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 466 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:33:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-01-18 17:33:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 395. [2022-01-18 17:33:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.017766497461929) internal successors, (795), 394 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 795 transitions. [2022-01-18 17:33:57,584 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 795 transitions. Word has length 30 [2022-01-18 17:33:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:33:57,584 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 795 transitions. [2022-01-18 17:33:57,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:33:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 795 transitions. [2022-01-18 17:33:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:33:57,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:33:57,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:33:57,601 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 17:33:57,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:57,789 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:33:57,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:33:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash -784785363, now seen corresponding path program 32 times [2022-01-18 17:33:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:33:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795071321] [2022-01-18 17:33:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:33:57,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:33:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:33:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:58,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:33:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795071321] [2022-01-18 17:33:58,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795071321] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:33:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263358432] [2022-01-18 17:33:58,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:33:58,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:33:58,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:33:58,165 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 17:33:58,166 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 17:33:58,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:33:58,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:33:58,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:33:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:33:58,350 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 17:33:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:58,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:33:59,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:33:59,307 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 29 [2022-01-18 17:33:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:33:59,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263358432] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:33:59,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:33:59,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:33:59,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308770712] [2022-01-18 17:33:59,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:33:59,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:33:59,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:33:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:33:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:33:59,417 INFO L87 Difference]: Start difference. First operand 395 states and 795 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:02,874 INFO L93 Difference]: Finished difference Result 1073 states and 2106 transitions. [2022-01-18 17:34:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 17:34:02,874 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:02,876 INFO L225 Difference]: With dead ends: 1073 [2022-01-18 17:34:02,876 INFO L226 Difference]: Without dead ends: 1066 [2022-01-18 17:34:02,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3248 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1183, Invalid=8917, Unknown=0, NotChecked=0, Total=10100 [2022-01-18 17:34:02,877 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 329 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:02,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 473 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2469 Invalid, 0 Unknown, 162 Unchecked, 1.0s Time] [2022-01-18 17:34:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-01-18 17:34:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 397. [2022-01-18 17:34:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.0126262626262625) internal successors, (797), 396 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 797 transitions. [2022-01-18 17:34:02,885 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 797 transitions. Word has length 30 [2022-01-18 17:34:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:02,886 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 797 transitions. [2022-01-18 17:34:02,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 797 transitions. [2022-01-18 17:34:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:02,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:02,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:02,905 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 17:34:03,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:03,100 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash 192656173, now seen corresponding path program 33 times [2022-01-18 17:34:03,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:03,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275700578] [2022-01-18 17:34:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:03,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:03,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275700578] [2022-01-18 17:34:03,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275700578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868132396] [2022-01-18 17:34:03,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:03,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:03,441 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 17:34:03,443 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 17:34:03,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:03,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:03,629 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 17:34:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:03,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:04,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:04,494 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 24 treesize of output 26 [2022-01-18 17:34:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:04,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868132396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:04,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:04,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:34:04,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876769247] [2022-01-18 17:34:04,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:04,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:34:04,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:04,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:34:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:34:04,585 INFO L87 Difference]: Start difference. First operand 397 states and 797 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:06,969 INFO L93 Difference]: Finished difference Result 727 states and 1433 transitions. [2022-01-18 17:34:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:34:06,969 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:06,970 INFO L225 Difference]: With dead ends: 727 [2022-01-18 17:34:06,970 INFO L226 Difference]: Without dead ends: 706 [2022-01-18 17:34:06,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=680, Invalid=5962, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 17:34:06,971 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 251 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:06,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 344 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1704 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-01-18 17:34:06,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-01-18 17:34:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 393. [2022-01-18 17:34:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.017857142857143) internal successors, (791), 392 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 791 transitions. [2022-01-18 17:34:06,978 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 791 transitions. Word has length 30 [2022-01-18 17:34:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:06,978 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 791 transitions. [2022-01-18 17:34:06,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:06,979 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 791 transitions. [2022-01-18 17:34:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:06,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:06,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:07,005 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 17:34:07,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-01-18 17:34:07,193 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash 683881355, now seen corresponding path program 34 times [2022-01-18 17:34:07,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661543215] [2022-01-18 17:34:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:07,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:07,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661543215] [2022-01-18 17:34:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661543215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:07,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668685002] [2022-01-18 17:34:07,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:07,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:07,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:07,590 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 17:34:07,591 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 17:34:07,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:07,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:07,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:07,785 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 17:34:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:08,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:08,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:08,531 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 24 treesize of output 26 [2022-01-18 17:34:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668685002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:08,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:08,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:34:08,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374239625] [2022-01-18 17:34:08,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:08,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:34:08,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:08,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:34:08,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:34:08,615 INFO L87 Difference]: Start difference. First operand 393 states and 791 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:10,969 INFO L93 Difference]: Finished difference Result 864 states and 1702 transitions. [2022-01-18 17:34:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:34:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:10,971 INFO L225 Difference]: With dead ends: 864 [2022-01-18 17:34:10,971 INFO L226 Difference]: Without dead ends: 803 [2022-01-18 17:34:10,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=5527, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:34:10,971 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 224 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:10,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 599 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:34:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-18 17:34:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 392. [2022-01-18 17:34:10,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.002557544757033) internal successors, (783), 391 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 783 transitions. [2022-01-18 17:34:10,979 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 783 transitions. Word has length 30 [2022-01-18 17:34:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:10,979 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 783 transitions. [2022-01-18 17:34:10,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 783 transitions. [2022-01-18 17:34:10,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:10,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:10,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:10,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:11,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 17:34:11,187 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1572499745, now seen corresponding path program 35 times [2022-01-18 17:34:11,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:11,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606272954] [2022-01-18 17:34:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:11,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:11,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606272954] [2022-01-18 17:34:11,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606272954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696247208] [2022-01-18 17:34:11,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:11,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:11,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:11,592 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 17:34:11,595 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 17:34:11,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:11,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:11,830 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 17:34:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:12,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:12,629 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 24 treesize of output 26 [2022-01-18 17:34:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:12,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696247208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:12,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:12,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:34:12,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495586551] [2022-01-18 17:34:12,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:12,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:34:12,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:34:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:34:12,719 INFO L87 Difference]: Start difference. First operand 392 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:14,127 INFO L93 Difference]: Finished difference Result 750 states and 1475 transitions. [2022-01-18 17:34:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:34:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:34:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:14,128 INFO L225 Difference]: With dead ends: 750 [2022-01-18 17:34:14,128 INFO L226 Difference]: Without dead ends: 741 [2022-01-18 17:34:14,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:34:14,129 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 133 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 457 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-18 17:34:14,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 394. [2022-01-18 17:34:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0) internal successors, (786), 393 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 786 transitions. [2022-01-18 17:34:14,137 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 786 transitions. Word has length 30 [2022-01-18 17:34:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:14,137 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 786 transitions. [2022-01-18 17:34:14,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 786 transitions. [2022-01-18 17:34:14,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:14,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:14,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:14,160 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 17:34:14,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 17:34:14,352 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:14,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1840401827, now seen corresponding path program 36 times [2022-01-18 17:34:14,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694750863] [2022-01-18 17:34:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:14,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:14,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694750863] [2022-01-18 17:34:14,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694750863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580738079] [2022-01-18 17:34:14,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:14,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:14,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:14,707 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 17:34:14,708 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 17:34:14,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:34:14,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:14,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:14,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:14,892 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 17:34:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:15,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:15,692 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 24 treesize of output 26 [2022-01-18 17:34:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580738079] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:15,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:15,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:34:15,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249693338] [2022-01-18 17:34:15,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:15,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:34:15,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:15,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:34:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:34:15,797 INFO L87 Difference]: Start difference. First operand 394 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:17,285 INFO L93 Difference]: Finished difference Result 642 states and 1273 transitions. [2022-01-18 17:34:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:34:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:34:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:17,286 INFO L225 Difference]: With dead ends: 642 [2022-01-18 17:34:17,286 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 17:34:17,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=416, Invalid=3744, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:34:17,287 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:17,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 348 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 17:34:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 384. [2022-01-18 17:34:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0130548302872064) internal successors, (771), 383 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 771 transitions. [2022-01-18 17:34:17,293 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 771 transitions. Word has length 30 [2022-01-18 17:34:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:17,293 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 771 transitions. [2022-01-18 17:34:17,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 771 transitions. [2022-01-18 17:34:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:17,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:17,294 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:17,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 17:34:17,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:17,494 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1576557819, now seen corresponding path program 37 times [2022-01-18 17:34:17,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:17,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905948364] [2022-01-18 17:34:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:17,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:17,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:17,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905948364] [2022-01-18 17:34:17,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905948364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:17,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053368201] [2022-01-18 17:34:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:17,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:17,874 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 17:34:17,875 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 17:34:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:18,099 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 17:34:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:18,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:18,900 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 24 treesize of output 26 [2022-01-18 17:34:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:18,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053368201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:18,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:18,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-01-18 17:34:18,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985426130] [2022-01-18 17:34:18,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:18,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 17:34:18,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 17:34:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:34:18,986 INFO L87 Difference]: Start difference. First operand 384 states and 771 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:20,269 INFO L93 Difference]: Finished difference Result 758 states and 1502 transitions. [2022-01-18 17:34:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:34:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:20,271 INFO L225 Difference]: With dead ends: 758 [2022-01-18 17:34:20,271 INFO L226 Difference]: Without dead ends: 725 [2022-01-18 17:34:20,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=3398, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:34:20,272 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:20,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 408 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-18 17:34:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 381. [2022-01-18 17:34:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.0157894736842104) internal successors, (766), 380 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 766 transitions. [2022-01-18 17:34:20,279 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 766 transitions. Word has length 30 [2022-01-18 17:34:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:20,279 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 766 transitions. [2022-01-18 17:34:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 766 transitions. [2022-01-18 17:34:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:20,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:20,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:20,304 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 17:34:20,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 17:34:20,495 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 841891467, now seen corresponding path program 38 times [2022-01-18 17:34:20,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108541298] [2022-01-18 17:34:20,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:20,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:20,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108541298] [2022-01-18 17:34:20,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108541298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497600774] [2022-01-18 17:34:20,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:20,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:20,876 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 17:34:20,879 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 17:34:20,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:20,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:20,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:20,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:21,066 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 17:34:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:21,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:21,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:21,857 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 24 treesize of output 26 [2022-01-18 17:34:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:21,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497600774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:21,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:21,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:34:21,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326050221] [2022-01-18 17:34:21,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:21,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:34:21,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:34:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:34:21,942 INFO L87 Difference]: Start difference. First operand 381 states and 766 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:23,315 INFO L93 Difference]: Finished difference Result 770 states and 1514 transitions. [2022-01-18 17:34:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:34:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:34:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:23,317 INFO L225 Difference]: With dead ends: 770 [2022-01-18 17:34:23,317 INFO L226 Difference]: Without dead ends: 761 [2022-01-18 17:34:23,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=3894, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:34:23,318 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 176 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 392 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-18 17:34:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 395. [2022-01-18 17:34:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.010152284263959) internal successors, (792), 394 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 792 transitions. [2022-01-18 17:34:23,324 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 792 transitions. Word has length 30 [2022-01-18 17:34:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:23,324 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 792 transitions. [2022-01-18 17:34:23,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 792 transitions. [2022-01-18 17:34:23,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:23,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:23,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:23,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:23,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:23,525 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1723957191, now seen corresponding path program 39 times [2022-01-18 17:34:23,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:23,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932890430] [2022-01-18 17:34:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:23,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:23,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932890430] [2022-01-18 17:34:23,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932890430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792157629] [2022-01-18 17:34:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:23,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:23,940 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 17:34:23,967 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 17:34:23,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:34:23,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:23,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:24,155 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 17:34:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:24,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:25,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:25,074 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 24 treesize of output 26 [2022-01-18 17:34:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792157629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:25,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:34:25,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146639042] [2022-01-18 17:34:25,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:25,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:34:25,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:34:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:34:25,158 INFO L87 Difference]: Start difference. First operand 395 states and 792 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:26,719 INFO L93 Difference]: Finished difference Result 667 states and 1316 transitions. [2022-01-18 17:34:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:34:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:34:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:26,720 INFO L225 Difference]: With dead ends: 667 [2022-01-18 17:34:26,720 INFO L226 Difference]: Without dead ends: 642 [2022-01-18 17:34:26,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=440, Invalid=4116, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:34:26,721 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 209 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:26,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 331 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1357 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-01-18 17:34:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-18 17:34:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 393. [2022-01-18 17:34:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-01-18 17:34:26,726 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-01-18 17:34:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:26,726 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-01-18 17:34:26,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-01-18 17:34:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:26,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:26,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:26,742 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 17:34:26,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-01-18 17:34:26,927 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:26,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1102343387, now seen corresponding path program 40 times [2022-01-18 17:34:26,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:26,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584767519] [2022-01-18 17:34:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:26,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584767519] [2022-01-18 17:34:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584767519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759583968] [2022-01-18 17:34:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:27,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:27,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:27,276 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 17:34:27,277 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 17:34:27,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:27,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:27,453 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 17:34:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:27,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:28,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:28,196 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 24 treesize of output 26 [2022-01-18 17:34:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:28,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759583968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:28,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:28,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:34:28,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741398231] [2022-01-18 17:34:28,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:28,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:34:28,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:34:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:34:28,278 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:29,478 INFO L93 Difference]: Finished difference Result 785 states and 1551 transitions. [2022-01-18 17:34:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:34:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:29,479 INFO L225 Difference]: With dead ends: 785 [2022-01-18 17:34:29,479 INFO L226 Difference]: Without dead ends: 740 [2022-01-18 17:34:29,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=386, Invalid=3396, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:34:29,480 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 154 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:29,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 337 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-01-18 17:34:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 385. [2022-01-18 17:34:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0104166666666665) internal successors, (772), 384 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 772 transitions. [2022-01-18 17:34:29,488 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 772 transitions. Word has length 30 [2022-01-18 17:34:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:29,488 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 772 transitions. [2022-01-18 17:34:29,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 772 transitions. [2022-01-18 17:34:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:29,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:29,489 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:29,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 17:34:29,707 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,SelfDestructingSolverStorable52 [2022-01-18 17:34:29,707 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 845949541, now seen corresponding path program 41 times [2022-01-18 17:34:29,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336072339] [2022-01-18 17:34:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:29,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:30,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336072339] [2022-01-18 17:34:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336072339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76894138] [2022-01-18 17:34:30,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:30,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:30,014 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 17:34:30,014 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 17:34:30,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:30,192 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 17:34:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:30,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:30,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:30,961 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 24 treesize of output 26 [2022-01-18 17:34:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:31,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76894138] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:31,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:31,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-01-18 17:34:31,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552399503] [2022-01-18 17:34:31,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:31,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-18 17:34:31,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-18 17:34:31,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 17:34:31,043 INFO L87 Difference]: Start difference. First operand 385 states and 772 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:32,171 INFO L93 Difference]: Finished difference Result 768 states and 1520 transitions. [2022-01-18 17:34:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:34:32,171 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:32,173 INFO L225 Difference]: With dead ends: 768 [2022-01-18 17:34:32,173 INFO L226 Difference]: Without dead ends: 735 [2022-01-18 17:34:32,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=365, Invalid=3295, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:34:32,174 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:32,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 364 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-18 17:34:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 383. [2022-01-18 17:34:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.0104712041884816) internal successors, (768), 382 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 768 transitions. [2022-01-18 17:34:32,181 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 768 transitions. Word has length 30 [2022-01-18 17:34:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:32,181 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 768 transitions. [2022-01-18 17:34:32,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 768 transitions. [2022-01-18 17:34:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:32,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:32,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:32,207 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 17:34:32,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:32,404 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:32,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1493559199, now seen corresponding path program 42 times [2022-01-18 17:34:32,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:32,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262578519] [2022-01-18 17:34:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:32,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:32,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262578519] [2022-01-18 17:34:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262578519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599810960] [2022-01-18 17:34:32,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:32,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:32,805 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 17:34:32,806 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 17:34:32,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:34:32,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:32,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:33,034 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 17:34:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:33,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:33,910 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 24 treesize of output 26 [2022-01-18 17:34:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:33,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599810960] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:33,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:33,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2022-01-18 17:34:33,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960816364] [2022-01-18 17:34:33,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:33,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:34:33,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:33,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:34:33,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1793, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:34:33,998 INFO L87 Difference]: Start difference. First operand 383 states and 768 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:35,228 INFO L93 Difference]: Finished difference Result 766 states and 1516 transitions. [2022-01-18 17:34:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:34:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:35,230 INFO L225 Difference]: With dead ends: 766 [2022-01-18 17:34:35,230 INFO L226 Difference]: Without dead ends: 730 [2022-01-18 17:34:35,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=3770, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:34:35,230 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:35,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 425 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-01-18 17:34:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 380. [2022-01-18 17:34:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.0131926121372032) internal successors, (763), 379 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 763 transitions. [2022-01-18 17:34:35,238 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 763 transitions. Word has length 30 [2022-01-18 17:34:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:35,238 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 763 transitions. [2022-01-18 17:34:35,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 763 transitions. [2022-01-18 17:34:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:35,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:35,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:35,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 17:34:35,458 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,SelfDestructingSolverStorable54 [2022-01-18 17:34:35,458 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 866178951, now seen corresponding path program 43 times [2022-01-18 17:34:35,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:35,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062500184] [2022-01-18 17:34:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:35,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:35,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:35,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062500184] [2022-01-18 17:34:35,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062500184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:35,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423583374] [2022-01-18 17:34:35,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:35,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:35,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:35,808 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 17:34:35,809 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 17:34:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:35,910 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 17:34:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:36,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:36,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:36,649 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 24 treesize of output 26 [2022-01-18 17:34:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:36,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423583374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:36,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:36,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:34:36,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246094429] [2022-01-18 17:34:36,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:36,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:34:36,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:34:36,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:34:36,724 INFO L87 Difference]: Start difference. First operand 380 states and 763 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:38,193 INFO L93 Difference]: Finished difference Result 779 states and 1534 transitions. [2022-01-18 17:34:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:34:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:38,195 INFO L225 Difference]: With dead ends: 779 [2022-01-18 17:34:38,195 INFO L226 Difference]: Without dead ends: 770 [2022-01-18 17:34:38,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=461, Invalid=3699, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:34:38,196 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:38,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 354 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-01-18 17:34:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 404. [2022-01-18 17:34:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-01-18 17:34:38,203 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-01-18 17:34:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:38,204 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-01-18 17:34:38,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-01-18 17:34:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:38,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:38,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:38,227 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 17:34:38,427 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,SelfDestructingSolverStorable55 [2022-01-18 17:34:38,427 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1748244675, now seen corresponding path program 44 times [2022-01-18 17:34:38,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:38,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70040011] [2022-01-18 17:34:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:38,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70040011] [2022-01-18 17:34:38,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70040011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115650181] [2022-01-18 17:34:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:38,733 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 17:34:38,733 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 17:34:38,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:38,849 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 17:34:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:39,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:39,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:39,746 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 29 [2022-01-18 17:34:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:39,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115650181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:39,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:39,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-01-18 17:34:39,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619252581] [2022-01-18 17:34:39,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:39,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:34:39,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:34:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:34:39,831 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:41,501 INFO L93 Difference]: Finished difference Result 694 states and 1369 transitions. [2022-01-18 17:34:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:34:41,502 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:41,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:41,503 INFO L225 Difference]: With dead ends: 694 [2022-01-18 17:34:41,503 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 17:34:41,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=535, Invalid=4157, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:34:41,503 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:41,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 282 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 17:34:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 402. [2022-01-18 17:34:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-01-18 17:34:41,509 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-01-18 17:34:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:41,509 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-01-18 17:34:41,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-01-18 17:34:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:41,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:41,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:41,525 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 17:34:41,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:41,710 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1078055903, now seen corresponding path program 45 times [2022-01-18 17:34:41,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:41,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273095445] [2022-01-18 17:34:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:41,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:42,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:42,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273095445] [2022-01-18 17:34:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273095445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647036219] [2022-01-18 17:34:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:42,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:42,048 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 17:34:42,049 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 17:34:42,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:42,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:42,147 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 17:34:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:42,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:42,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:42,827 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 24 treesize of output 26 [2022-01-18 17:34:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:42,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647036219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:42,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:42,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-01-18 17:34:42,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809319597] [2022-01-18 17:34:42,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:42,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:34:42,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:34:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:34:42,895 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:44,354 INFO L93 Difference]: Finished difference Result 797 states and 1566 transitions. [2022-01-18 17:34:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:34:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:44,356 INFO L225 Difference]: With dead ends: 797 [2022-01-18 17:34:44,356 INFO L226 Difference]: Without dead ends: 760 [2022-01-18 17:34:44,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=455, Invalid=3451, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:34:44,357 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 193 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:44,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 340 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-18 17:34:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 400. [2022-01-18 17:34:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-01-18 17:34:44,363 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-01-18 17:34:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:44,363 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-01-18 17:34:44,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-01-18 17:34:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:44,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:44,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:44,379 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 17:34:44,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:44,564 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash -156353763, now seen corresponding path program 46 times [2022-01-18 17:34:44,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:44,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818356368] [2022-01-18 17:34:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:44,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:44,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:44,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818356368] [2022-01-18 17:34:44,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818356368] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452540944] [2022-01-18 17:34:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:34:44,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:44,879 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 17:34:44,880 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 17:34:44,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:34:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:44,973 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 17:34:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:45,661 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:45,661 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 24 treesize of output 26 [2022-01-18 17:34:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:45,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452540944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:45,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:45,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:34:45,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804103908] [2022-01-18 17:34:45,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:45,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:34:45,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:45,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:34:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:34:45,750 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:47,158 INFO L93 Difference]: Finished difference Result 782 states and 1544 transitions. [2022-01-18 17:34:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:34:47,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:47,160 INFO L225 Difference]: With dead ends: 782 [2022-01-18 17:34:47,160 INFO L226 Difference]: Without dead ends: 739 [2022-01-18 17:34:47,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=444, Invalid=3588, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:34:47,160 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 181 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:47,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 319 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-01-18 17:34:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 388. [2022-01-18 17:34:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-01-18 17:34:47,168 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-01-18 17:34:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:47,168 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-01-18 17:34:47,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-01-18 17:34:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:47,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:47,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:47,193 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 17:34:47,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:47,390 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:47,391 INFO L85 PathProgramCache]: Analyzing trace with hash -970774179, now seen corresponding path program 47 times [2022-01-18 17:34:47,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:47,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129259405] [2022-01-18 17:34:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:47,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:47,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129259405] [2022-01-18 17:34:47,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129259405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:47,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260603810] [2022-01-18 17:34:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:34:47,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:47,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:47,725 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 17:34:47,726 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 17:34:47,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:34:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:47,818 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 17:34:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:48,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:48,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:48,504 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 24 treesize of output 26 [2022-01-18 17:34:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260603810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:48,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:48,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-01-18 17:34:48,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633311984] [2022-01-18 17:34:48,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:48,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:34:48,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:34:48,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:34:48,583 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:50,007 INFO L93 Difference]: Finished difference Result 793 states and 1557 transitions. [2022-01-18 17:34:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:34:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:50,009 INFO L225 Difference]: With dead ends: 793 [2022-01-18 17:34:50,009 INFO L226 Difference]: Without dead ends: 784 [2022-01-18 17:34:50,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:34:50,010 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:50,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 297 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-18 17:34:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 405. [2022-01-18 17:34:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-01-18 17:34:50,018 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-01-18 17:34:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-01-18 17:34:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-01-18 17:34:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:50,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:50,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:50,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 17:34:50,233 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,SelfDestructingSolverStorable59 [2022-01-18 17:34:50,233 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash -88708455, now seen corresponding path program 48 times [2022-01-18 17:34:50,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848056515] [2022-01-18 17:34:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:50,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848056515] [2022-01-18 17:34:50,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848056515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:50,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227220084] [2022-01-18 17:34:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:34:50,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:50,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:50,576 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 17:34:50,577 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 17:34:50,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:34:50,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:50,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:50,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:50,698 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 17:34:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:51,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:51,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:51,501 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 24 treesize of output 26 [2022-01-18 17:34:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227220084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:51,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:51,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-01-18 17:34:51,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636642371] [2022-01-18 17:34:51,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:34:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:34:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:34:51,585 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:53,277 INFO L93 Difference]: Finished difference Result 690 states and 1367 transitions. [2022-01-18 17:34:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:34:53,277 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:53,278 INFO L225 Difference]: With dead ends: 690 [2022-01-18 17:34:53,278 INFO L226 Difference]: Without dead ends: 675 [2022-01-18 17:34:53,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:34:53,279 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 180 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:53,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 333 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:34:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-18 17:34:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 403. [2022-01-18 17:34:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0074626865671643) internal successors, (807), 402 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 807 transitions. [2022-01-18 17:34:53,284 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 807 transitions. Word has length 30 [2022-01-18 17:34:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 807 transitions. [2022-01-18 17:34:53,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 807 transitions. [2022-01-18 17:34:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:53,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:53,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:53,300 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 17:34:53,485 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,SelfDestructingSolverStorable60 [2022-01-18 17:34:53,485 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:53,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:53,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1379958263, now seen corresponding path program 49 times [2022-01-18 17:34:53,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:53,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73050772] [2022-01-18 17:34:53,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:53,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:53,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73050772] [2022-01-18 17:34:53,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73050772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:53,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514867625] [2022-01-18 17:34:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:34:53,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:53,823 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 17:34:53,825 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 17:34:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:53,950 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 17:34:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:54,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:54,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:54,682 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 24 treesize of output 26 [2022-01-18 17:34:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:54,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514867625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:54,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:54,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-01-18 17:34:54,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886630906] [2022-01-18 17:34:54,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:54,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:34:54,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:34:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:34:54,748 INFO L87 Difference]: Start difference. First operand 403 states and 807 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:56,273 INFO L93 Difference]: Finished difference Result 813 states and 1592 transitions. [2022-01-18 17:34:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:34:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:34:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:56,275 INFO L225 Difference]: With dead ends: 813 [2022-01-18 17:34:56,275 INFO L226 Difference]: Without dead ends: 776 [2022-01-18 17:34:56,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:34:56,275 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 202 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:56,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 320 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:34:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-18 17:34:56,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 401. [2022-01-18 17:34:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0075) internal successors, (803), 400 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 803 transitions. [2022-01-18 17:34:56,281 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 803 transitions. Word has length 30 [2022-01-18 17:34:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:56,281 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 803 transitions. [2022-01-18 17:34:56,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 803 transitions. [2022-01-18 17:34:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:56,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:56,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:56,297 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 17:34:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-01-18 17:34:56,482 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1993306893, now seen corresponding path program 50 times [2022-01-18 17:34:56,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:56,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861475909] [2022-01-18 17:34:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:56,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:56,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861475909] [2022-01-18 17:34:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861475909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:56,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032363081] [2022-01-18 17:34:56,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:34:56,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:56,797 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 17:34:56,798 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 17:34:56,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:34:56,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:34:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:56,892 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 17:34:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:57,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:34:57,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:34:57,680 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 29 [2022-01-18 17:34:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:57,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032363081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:34:57,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:34:57,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-01-18 17:34:57,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139136460] [2022-01-18 17:34:57,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:34:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:34:57,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:34:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:34:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:34:57,753 INFO L87 Difference]: Start difference. First operand 401 states and 803 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:34:59,202 INFO L93 Difference]: Finished difference Result 818 states and 1601 transitions. [2022-01-18 17:34:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:34:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:34:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:34:59,204 INFO L225 Difference]: With dead ends: 818 [2022-01-18 17:34:59,204 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 17:34:59,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 12 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=501, Invalid=3789, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:34:59,205 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:34:59,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 380 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1399 Invalid, 0 Unknown, 211 Unchecked, 0.5s Time] [2022-01-18 17:34:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 17:34:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 389. [2022-01-18 17:34:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-01-18 17:34:59,213 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-01-18 17:34:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:34:59,213 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-01-18 17:34:59,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:34:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-01-18 17:34:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:34:59,214 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:34:59,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:34:59,239 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 17:34:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:59,436 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:34:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:34:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1026634883, now seen corresponding path program 51 times [2022-01-18 17:34:59,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:34:59,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522444891] [2022-01-18 17:34:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:34:59,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:34:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:34:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:34:59,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:34:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522444891] [2022-01-18 17:34:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522444891] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:34:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207731055] [2022-01-18 17:34:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:34:59,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:34:59,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:34:59,745 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 17:34:59,748 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 17:34:59,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:34:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:34:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:34:59,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:34:59,853 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 17:35:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:00,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:00,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:00,616 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 24 treesize of output 26 [2022-01-18 17:35:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:00,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207731055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:00,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:00,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:35:00,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397558654] [2022-01-18 17:35:00,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:00,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:35:00,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:35:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:35:00,696 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:02,681 INFO L93 Difference]: Finished difference Result 857 states and 1684 transitions. [2022-01-18 17:35:02,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:35:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:35:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:02,683 INFO L225 Difference]: With dead ends: 857 [2022-01-18 17:35:02,683 INFO L226 Difference]: Without dead ends: 848 [2022-01-18 17:35:02,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=577, Invalid=4679, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:35:02,688 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 208 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:02,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 337 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-18 17:35:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 403. [2022-01-18 17:35:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-01-18 17:35:02,695 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-01-18 17:35:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:02,695 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-01-18 17:35:02,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-01-18 17:35:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:02,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:02,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:02,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 17:35:02,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:02,897 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1908700607, now seen corresponding path program 52 times [2022-01-18 17:35:02,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540363574] [2022-01-18 17:35:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:02,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:03,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:03,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540363574] [2022-01-18 17:35:03,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540363574] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:03,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105352724] [2022-01-18 17:35:03,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:03,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:03,213 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 17:35:03,214 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 17:35:03,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:03,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:03,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:03,309 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 17:35:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:03,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:04,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:04,087 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 24 treesize of output 26 [2022-01-18 17:35:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:04,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105352724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:04,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:04,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:35:04,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293247775] [2022-01-18 17:35:04,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:04,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:35:04,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:04,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:35:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:35:04,170 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:06,758 INFO L93 Difference]: Finished difference Result 1007 states and 1970 transitions. [2022-01-18 17:35:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:35:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:35:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:06,760 INFO L225 Difference]: With dead ends: 1007 [2022-01-18 17:35:06,760 INFO L226 Difference]: Without dead ends: 990 [2022-01-18 17:35:06,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=712, Invalid=5294, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:35:06,760 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:06,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 383 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1830 Invalid, 0 Unknown, 81 Unchecked, 0.7s Time] [2022-01-18 17:35:06,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-01-18 17:35:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 401. [2022-01-18 17:35:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0125) internal successors, (805), 400 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 805 transitions. [2022-01-18 17:35:06,767 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 805 transitions. Word has length 30 [2022-01-18 17:35:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:06,767 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 805 transitions. [2022-01-18 17:35:06,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 805 transitions. [2022-01-18 17:35:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:06,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:06,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:06,783 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 17:35:06,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-18 17:35:06,968 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:06,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -917599971, now seen corresponding path program 53 times [2022-01-18 17:35:06,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:06,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775430940] [2022-01-18 17:35:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:06,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:07,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775430940] [2022-01-18 17:35:07,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775430940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861544650] [2022-01-18 17:35:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:07,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:07,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:07,259 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 17:35:07,259 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 17:35:07,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:35:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:07,355 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 17:35:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:07,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:08,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:08,085 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 24 treesize of output 26 [2022-01-18 17:35:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:08,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861544650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:08,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:08,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-01-18 17:35:08,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750543885] [2022-01-18 17:35:08,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:08,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:35:08,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:35:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:35:08,156 INFO L87 Difference]: Start difference. First operand 401 states and 805 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:10,277 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-01-18 17:35:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:35:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:10,278 INFO L225 Difference]: With dead ends: 877 [2022-01-18 17:35:10,278 INFO L226 Difference]: Without dead ends: 816 [2022-01-18 17:35:10,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=648, Invalid=5052, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:35:10,279 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 251 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:10,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 351 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-18 17:35:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 400. [2022-01-18 17:35:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.9974937343358397) internal successors, (797), 399 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 797 transitions. [2022-01-18 17:35:10,287 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 797 transitions. Word has length 30 [2022-01-18 17:35:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:10,287 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 797 transitions. [2022-01-18 17:35:10,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 797 transitions. [2022-01-18 17:35:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:10,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:10,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:10,313 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 17:35:10,510 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,SelfDestructingSolverStorable65 [2022-01-18 17:35:10,510 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -28981581, now seen corresponding path program 54 times [2022-01-18 17:35:10,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804768700] [2022-01-18 17:35:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:10,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:10,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804768700] [2022-01-18 17:35:10,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804768700] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:10,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814258767] [2022-01-18 17:35:10,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:10,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:10,851 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 17:35:10,851 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 17:35:10,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:35:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:10,965 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 17:35:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:11,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:11,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:11,811 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 24 treesize of output 26 [2022-01-18 17:35:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814258767] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:11,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:11,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:35:11,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747746959] [2022-01-18 17:35:11,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:11,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:35:11,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:35:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:35:11,886 INFO L87 Difference]: Start difference. First operand 400 states and 797 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:13,196 INFO L93 Difference]: Finished difference Result 771 states and 1511 transitions. [2022-01-18 17:35:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:35:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:13,198 INFO L225 Difference]: With dead ends: 771 [2022-01-18 17:35:13,198 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 17:35:13,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=3058, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:35:13,198 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:13,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 327 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 17:35:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 402. [2022-01-18 17:35:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.9950124688279303) internal successors, (800), 401 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 800 transitions. [2022-01-18 17:35:13,205 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 800 transitions. Word has length 30 [2022-01-18 17:35:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:13,205 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 800 transitions. [2022-01-18 17:35:13,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 800 transitions. [2022-01-18 17:35:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:13,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:13,206 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:13,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-18 17:35:13,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:13,406 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:13,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:13,406 INFO L85 PathProgramCache]: Analyzing trace with hash 853084143, now seen corresponding path program 55 times [2022-01-18 17:35:13,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:13,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445370934] [2022-01-18 17:35:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:13,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:13,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445370934] [2022-01-18 17:35:13,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445370934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:13,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459747644] [2022-01-18 17:35:13,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:13,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:13,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:13,703 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 17:35:13,704 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 17:35:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:13,802 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 17:35:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:14,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:14,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:14,581 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 24 treesize of output 26 [2022-01-18 17:35:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:14,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459747644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:14,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:14,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:35:14,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684062624] [2022-01-18 17:35:14,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:14,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:35:14,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:35:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:35:14,657 INFO L87 Difference]: Start difference. First operand 402 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:16,058 INFO L93 Difference]: Finished difference Result 658 states and 1301 transitions. [2022-01-18 17:35:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:35:16,058 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:16,059 INFO L225 Difference]: With dead ends: 658 [2022-01-18 17:35:16,059 INFO L226 Difference]: Without dead ends: 635 [2022-01-18 17:35:16,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=3032, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:35:16,060 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:16,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 270 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:35:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-18 17:35:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 392. [2022-01-18 17:35:16,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-01-18 17:35:16,066 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-01-18 17:35:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:16,066 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-01-18 17:35:16,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-01-18 17:35:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:16,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:16,067 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:16,082 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 17:35:16,267 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,SelfDestructingSolverStorable67 [2022-01-18 17:35:16,268 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:16,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:16,268 INFO L85 PathProgramCache]: Analyzing trace with hash -24923507, now seen corresponding path program 56 times [2022-01-18 17:35:16,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:16,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435216602] [2022-01-18 17:35:16,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:16,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:16,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435216602] [2022-01-18 17:35:16,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435216602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:16,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403694147] [2022-01-18 17:35:16,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:16,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:16,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:16,558 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 17:35:16,558 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 17:35:16,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:16,647 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 17:35:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:16,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:17,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:17,396 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 24 treesize of output 26 [2022-01-18 17:35:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:17,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403694147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:17,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:17,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:35:17,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769346643] [2022-01-18 17:35:17,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:17,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:35:17,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:17,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:35:17,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:35:17,476 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:18,883 INFO L93 Difference]: Finished difference Result 768 states and 1515 transitions. [2022-01-18 17:35:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:35:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:18,884 INFO L225 Difference]: With dead ends: 768 [2022-01-18 17:35:18,884 INFO L226 Difference]: Without dead ends: 735 [2022-01-18 17:35:18,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=374, Invalid=3166, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:35:18,885 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:18,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 527 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-18 17:35:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 388. [2022-01-18 17:35:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-01-18 17:35:18,891 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-01-18 17:35:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:18,891 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-01-18 17:35:18,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-01-18 17:35:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:18,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:18,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:18,919 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 17:35:19,111 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,SelfDestructingSolverStorable68 [2022-01-18 17:35:19,112 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1032283343, now seen corresponding path program 57 times [2022-01-18 17:35:19,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336436659] [2022-01-18 17:35:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:19,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:19,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336436659] [2022-01-18 17:35:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336436659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784138169] [2022-01-18 17:35:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:19,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:19,495 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 17:35:19,496 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 17:35:19,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:35:19,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:19,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:19,668 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 17:35:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:19,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:20,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:20,434 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 24 treesize of output 26 [2022-01-18 17:35:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784138169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:20,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130778462] [2022-01-18 17:35:20,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:20,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:20,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:20,522 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:22,234 INFO L93 Difference]: Finished difference Result 801 states and 1571 transitions. [2022-01-18 17:35:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:35:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:22,236 INFO L225 Difference]: With dead ends: 801 [2022-01-18 17:35:22,236 INFO L226 Difference]: Without dead ends: 792 [2022-01-18 17:35:22,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=503, Invalid=4609, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:35:22,236 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:22,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 432 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-18 17:35:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 406. [2022-01-18 17:35:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-01-18 17:35:22,243 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-01-18 17:35:22,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:22,243 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-01-18 17:35:22,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-01-18 17:35:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:22,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:22,243 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:22,258 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 17:35:22,444 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,SelfDestructingSolverStorable69 [2022-01-18 17:35:22,444 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash -150217619, now seen corresponding path program 58 times [2022-01-18 17:35:22,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:22,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584828419] [2022-01-18 17:35:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:22,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:22,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584828419] [2022-01-18 17:35:22,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584828419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990174921] [2022-01-18 17:35:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:22,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:22,771 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 17:35:22,771 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 17:35:22,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:22,929 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 17:35:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:23,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:23,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:23,705 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 24 treesize of output 26 [2022-01-18 17:35:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:23,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990174921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:23,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:23,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:23,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12114219] [2022-01-18 17:35:23,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:23,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:23,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:23,798 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:25,732 INFO L93 Difference]: Finished difference Result 698 states and 1381 transitions. [2022-01-18 17:35:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:35:25,732 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:25,733 INFO L225 Difference]: With dead ends: 698 [2022-01-18 17:35:25,733 INFO L226 Difference]: Without dead ends: 683 [2022-01-18 17:35:25,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=538, Invalid=4574, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:35:25,734 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:25,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 415 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-18 17:35:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 404. [2022-01-18 17:35:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-01-18 17:35:25,739 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-01-18 17:35:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:25,739 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-01-18 17:35:25,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-01-18 17:35:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:25,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:25,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:25,758 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 17:35:25,942 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,SelfDestructingSolverStorable70 [2022-01-18 17:35:25,942 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1318449099, now seen corresponding path program 59 times [2022-01-18 17:35:25,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:25,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828369765] [2022-01-18 17:35:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:25,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:26,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:26,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828369765] [2022-01-18 17:35:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828369765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:26,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905667390] [2022-01-18 17:35:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:26,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:26,261 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 17:35:26,262 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 17:35:26,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:35:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:26,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:26,416 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 17:35:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:27,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:27,237 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 24 treesize of output 26 [2022-01-18 17:35:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905667390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:27,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:27,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:35:27,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256306895] [2022-01-18 17:35:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:35:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:35:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:35:27,316 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:29,305 INFO L93 Difference]: Finished difference Result 828 states and 1621 transitions. [2022-01-18 17:35:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:35:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:29,306 INFO L225 Difference]: With dead ends: 828 [2022-01-18 17:35:29,307 INFO L226 Difference]: Without dead ends: 791 [2022-01-18 17:35:29,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=555, Invalid=4847, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:35:29,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 168 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:29,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 575 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2279 Invalid, 0 Unknown, 134 Unchecked, 0.8s Time] [2022-01-18 17:35:29,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-18 17:35:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 402. [2022-01-18 17:35:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-01-18 17:35:29,313 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-01-18 17:35:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:29,313 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-01-18 17:35:29,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:29,313 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-01-18 17:35:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:29,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:29,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:29,329 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 17:35:29,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:29,514 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2054816057, now seen corresponding path program 60 times [2022-01-18 17:35:29,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:29,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500760013] [2022-01-18 17:35:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:29,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:29,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500760013] [2022-01-18 17:35:29,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500760013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76521702] [2022-01-18 17:35:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:29,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:29,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:29,819 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 17:35:29,819 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 17:35:29,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:35:29,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:29,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:29,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:29,979 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 17:35:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:30,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:30,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:30,744 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 24 treesize of output 26 [2022-01-18 17:35:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:30,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76521702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:30,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:30,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:30,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993023630] [2022-01-18 17:35:30,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:30,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:30,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:30,840 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:31,892 INFO L93 Difference]: Finished difference Result 677 states and 1337 transitions. [2022-01-18 17:35:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:35:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:31,893 INFO L225 Difference]: With dead ends: 677 [2022-01-18 17:35:31,893 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 17:35:31,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=2945, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:35:31,893 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:31,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 483 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1314 Invalid, 0 Unknown, 112 Unchecked, 0.5s Time] [2022-01-18 17:35:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 17:35:31,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 416. [2022-01-18 17:35:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9903614457831325) internal successors, (826), 415 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 826 transitions. [2022-01-18 17:35:31,898 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 826 transitions. Word has length 30 [2022-01-18 17:35:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:31,898 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 826 transitions. [2022-01-18 17:35:31,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 826 transitions. [2022-01-18 17:35:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:31,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:31,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:31,915 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 17:35:32,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:32,100 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:32,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1077374521, now seen corresponding path program 61 times [2022-01-18 17:35:32,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:32,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677657827] [2022-01-18 17:35:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:32,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:32,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677657827] [2022-01-18 17:35:32,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677657827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:32,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705750707] [2022-01-18 17:35:32,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:32,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:32,419 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 17:35:32,424 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 17:35:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:32,586 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 17:35:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:32,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:33,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:33,369 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 24 treesize of output 26 [2022-01-18 17:35:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:33,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705750707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:33,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:33,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:33,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217758276] [2022-01-18 17:35:33,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:33,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:33,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:33,458 INFO L87 Difference]: Start difference. First operand 416 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:35,054 INFO L93 Difference]: Finished difference Result 795 states and 1565 transitions. [2022-01-18 17:35:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:35:35,054 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:35,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:35,055 INFO L225 Difference]: With dead ends: 795 [2022-01-18 17:35:35,055 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 17:35:35,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=533, Invalid=4723, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:35:35,056 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 167 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:35,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 408 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1484 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2022-01-18 17:35:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 17:35:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 390. [2022-01-18 17:35:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.0102827763496145) internal successors, (782), 389 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:35,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 782 transitions. [2022-01-18 17:35:35,062 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 782 transitions. Word has length 30 [2022-01-18 17:35:35,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:35,063 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 782 transitions. [2022-01-18 17:35:35,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:35,063 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 782 transitions. [2022-01-18 17:35:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:35,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:35,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:35,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:35,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:35,286 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:35,286 INFO L85 PathProgramCache]: Analyzing trace with hash 965125719, now seen corresponding path program 62 times [2022-01-18 17:35:35,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:35,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191745740] [2022-01-18 17:35:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:35,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191745740] [2022-01-18 17:35:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191745740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476025649] [2022-01-18 17:35:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:35,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:35,638 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 17:35:35,638 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 17:35:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:35,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:35,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:35,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:35,792 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 17:35:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:36,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:36,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:36,699 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 29 [2022-01-18 17:35:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476025649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:36,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:36,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:35:36,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918743843] [2022-01-18 17:35:36,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:35:36,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:36,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:35:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:35:36,797 INFO L87 Difference]: Start difference. First operand 390 states and 782 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:39,274 INFO L93 Difference]: Finished difference Result 952 states and 1864 transitions. [2022-01-18 17:35:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:35:39,275 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:39,276 INFO L225 Difference]: With dead ends: 952 [2022-01-18 17:35:39,276 INFO L226 Difference]: Without dead ends: 943 [2022-01-18 17:35:39,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2611 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=7221, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 17:35:39,277 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 284 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 2181 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:39,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 425 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:35:39,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-01-18 17:35:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 404. [2022-01-18 17:35:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0124069478908186) internal successors, (811), 403 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 811 transitions. [2022-01-18 17:35:39,283 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 811 transitions. Word has length 30 [2022-01-18 17:35:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:39,283 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 811 transitions. [2022-01-18 17:35:39,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 811 transitions. [2022-01-18 17:35:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:39,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:39,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:39,301 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 17:35:39,484 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,SelfDestructingSolverStorable74 [2022-01-18 17:35:39,484 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1847191443, now seen corresponding path program 63 times [2022-01-18 17:35:39,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:39,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792912288] [2022-01-18 17:35:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:39,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:39,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:39,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792912288] [2022-01-18 17:35:39,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792912288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:39,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130099702] [2022-01-18 17:35:39,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:35:39,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:39,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:39,805 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 17:35:39,806 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 17:35:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:35:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:35:39,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:39,959 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 17:35:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:40,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:40,795 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 24 treesize of output 26 [2022-01-18 17:35:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:40,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130099702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:40,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:40,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:40,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439960234] [2022-01-18 17:35:40,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:40,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:40,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:40,898 INFO L87 Difference]: Start difference. First operand 404 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:43,243 INFO L93 Difference]: Finished difference Result 742 states and 1466 transitions. [2022-01-18 17:35:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 17:35:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:43,244 INFO L225 Difference]: With dead ends: 742 [2022-01-18 17:35:43,244 INFO L226 Difference]: Without dead ends: 727 [2022-01-18 17:35:43,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=680, Invalid=5482, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:35:43,245 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 226 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:43,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 365 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:35:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-01-18 17:35:43,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 402. [2022-01-18 17:35:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0124688279301743) internal successors, (807), 401 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:43,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 807 transitions. [2022-01-18 17:35:43,250 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 807 transitions. Word has length 30 [2022-01-18 17:35:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:43,250 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 807 transitions. [2022-01-18 17:35:43,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 807 transitions. [2022-01-18 17:35:43,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:43,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:43,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:43,266 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 17:35:43,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:43,452 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -979109135, now seen corresponding path program 64 times [2022-01-18 17:35:43,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:43,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249567915] [2022-01-18 17:35:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:43,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:43,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249567915] [2022-01-18 17:35:43,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249567915] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397864981] [2022-01-18 17:35:43,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:35:43,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:43,757 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 17:35:43,758 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 17:35:43,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:35:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:43,930 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 17:35:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:44,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:44,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:44,655 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 24 treesize of output 26 [2022-01-18 17:35:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:44,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397864981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:44,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:44,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:35:44,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355096761] [2022-01-18 17:35:44,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:44,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:35:44,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:35:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:35:44,740 INFO L87 Difference]: Start difference. First operand 402 states and 807 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:47,015 INFO L93 Difference]: Finished difference Result 889 states and 1746 transitions. [2022-01-18 17:35:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:35:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:47,016 INFO L225 Difference]: With dead ends: 889 [2022-01-18 17:35:47,016 INFO L226 Difference]: Without dead ends: 828 [2022-01-18 17:35:47,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=668, Invalid=5494, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:35:47,017 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 213 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 511 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:35:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-01-18 17:35:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 401. [2022-01-18 17:35:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.9975) internal successors, (799), 400 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 799 transitions. [2022-01-18 17:35:47,023 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 799 transitions. Word has length 30 [2022-01-18 17:35:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:47,023 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 799 transitions. [2022-01-18 17:35:47,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 799 transitions. [2022-01-18 17:35:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:47,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:47,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:47,039 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 17:35:47,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:47,224 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:47,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:47,224 INFO L85 PathProgramCache]: Analyzing trace with hash -90490745, now seen corresponding path program 65 times [2022-01-18 17:35:47,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834933382] [2022-01-18 17:35:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:47,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:47,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:47,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834933382] [2022-01-18 17:35:47,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834933382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:47,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983070270] [2022-01-18 17:35:47,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:35:47,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:47,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:47,531 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 17:35:47,532 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 17:35:47,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:47,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:47,689 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 17:35:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:48,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:48,472 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 24 treesize of output 26 [2022-01-18 17:35:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:48,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983070270] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:48,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:48,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:48,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097798580] [2022-01-18 17:35:48,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:48,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:48,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:48,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:48,563 INFO L87 Difference]: Start difference. First operand 401 states and 799 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:49,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:49,983 INFO L93 Difference]: Finished difference Result 773 states and 1515 transitions. [2022-01-18 17:35:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:35:49,984 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:35:49,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:49,984 INFO L225 Difference]: With dead ends: 773 [2022-01-18 17:35:49,984 INFO L226 Difference]: Without dead ends: 764 [2022-01-18 17:35:49,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=400, Invalid=3632, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:35:49,985 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 123 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:49,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 491 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:35:49,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-01-18 17:35:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 403. [2022-01-18 17:35:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9950248756218905) internal successors, (802), 402 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 802 transitions. [2022-01-18 17:35:49,990 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 802 transitions. Word has length 30 [2022-01-18 17:35:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:49,990 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 802 transitions. [2022-01-18 17:35:49,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 802 transitions. [2022-01-18 17:35:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:49,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:49,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:50,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 17:35:50,191 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,SelfDestructingSolverStorable77 [2022-01-18 17:35:50,191 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash 791574979, now seen corresponding path program 66 times [2022-01-18 17:35:50,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:50,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673778726] [2022-01-18 17:35:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:50,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:50,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673778726] [2022-01-18 17:35:50,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673778726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866780111] [2022-01-18 17:35:50,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:35:50,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:50,565 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 17:35:50,566 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 17:35:50,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:35:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:50,725 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 17:35:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:51,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:51,533 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 24 treesize of output 26 [2022-01-18 17:35:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:51,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866780111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:51,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:51,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:51,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981322452] [2022-01-18 17:35:51,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:51,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:51,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:51,617 INFO L87 Difference]: Start difference. First operand 403 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:53,061 INFO L93 Difference]: Finished difference Result 662 states and 1309 transitions. [2022-01-18 17:35:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:35:53,061 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:35:53,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:53,062 INFO L225 Difference]: With dead ends: 662 [2022-01-18 17:35:53,062 INFO L226 Difference]: Without dead ends: 639 [2022-01-18 17:35:53,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=424, Invalid=3608, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:35:53,063 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1567 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:53,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 349 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1567 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-01-18 17:35:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 393. [2022-01-18 17:35:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.00765306122449) internal successors, (787), 392 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 787 transitions. [2022-01-18 17:35:53,067 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 787 transitions. Word has length 30 [2022-01-18 17:35:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:53,067 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 787 transitions. [2022-01-18 17:35:53,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 787 transitions. [2022-01-18 17:35:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:53,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:53,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:53,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 17:35:53,268 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,SelfDestructingSolverStorable78 [2022-01-18 17:35:53,269 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:53,269 INFO L85 PathProgramCache]: Analyzing trace with hash -86432671, now seen corresponding path program 67 times [2022-01-18 17:35:53,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:53,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110308775] [2022-01-18 17:35:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:53,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:53,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:53,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110308775] [2022-01-18 17:35:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110308775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047137910] [2022-01-18 17:35:53,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:35:53,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:53,573 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 17:35:53,573 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 17:35:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:53,730 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 17:35:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:54,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:54,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:54,535 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 24 treesize of output 26 [2022-01-18 17:35:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:54,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047137910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:54,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:54,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:35:54,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624130783] [2022-01-18 17:35:54,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:54,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:35:54,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:54,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:35:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:35:54,617 INFO L87 Difference]: Start difference. First operand 393 states and 787 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:35:55,958 INFO L93 Difference]: Finished difference Result 781 states and 1542 transitions. [2022-01-18 17:35:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:35:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:35:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:35:55,960 INFO L225 Difference]: With dead ends: 781 [2022-01-18 17:35:55,960 INFO L226 Difference]: Without dead ends: 748 [2022-01-18 17:35:55,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=3499, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:35:55,960 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 145 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:35:55,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 477 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1691 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:35:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-18 17:35:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 389. [2022-01-18 17:35:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.0103092783505154) internal successors, (780), 388 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 780 transitions. [2022-01-18 17:35:55,966 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 780 transitions. Word has length 30 [2022-01-18 17:35:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:35:55,966 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 780 transitions. [2022-01-18 17:35:55,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:35:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 780 transitions. [2022-01-18 17:35:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:35:55,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:35:55,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:35:55,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-18 17:35:56,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:56,167 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:35:56,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:35:56,167 INFO L85 PathProgramCache]: Analyzing trace with hash -255678137, now seen corresponding path program 68 times [2022-01-18 17:35:56,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:35:56,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659182644] [2022-01-18 17:35:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:35:56,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:35:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:35:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:56,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:35:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659182644] [2022-01-18 17:35:56,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659182644] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:35:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961402480] [2022-01-18 17:35:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:35:56,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:35:56,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:35:56,472 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 17:35:56,473 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 17:35:56,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:35:56,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:35:56,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:35:56,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:35:56,626 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 17:35:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:56,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:35:57,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:35:57,505 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 29 [2022-01-18 17:35:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:35:57,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961402480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:35:57,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:35:57,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:35:57,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354644269] [2022-01-18 17:35:57,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:35:57,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:35:57,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:35:57,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:35:57,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:35:57,587 INFO L87 Difference]: Start difference. First operand 389 states and 780 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:00,117 INFO L93 Difference]: Finished difference Result 928 states and 1820 transitions. [2022-01-18 17:36:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:36:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:00,118 INFO L225 Difference]: With dead ends: 928 [2022-01-18 17:36:00,118 INFO L226 Difference]: Without dead ends: 919 [2022-01-18 17:36:00,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1089, Invalid=7653, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 17:36:00,118 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 285 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:00,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 404 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2140 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:36:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-01-18 17:36:00,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 404. [2022-01-18 17:36:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-01-18 17:36:00,124 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-01-18 17:36:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:00,125 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-01-18 17:36:00,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-01-18 17:36:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:00,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:00,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:00,141 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 17:36:00,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:00,326 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:00,326 INFO L85 PathProgramCache]: Analyzing trace with hash 626387587, now seen corresponding path program 69 times [2022-01-18 17:36:00,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:00,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273393162] [2022-01-18 17:36:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:00,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:00,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:00,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273393162] [2022-01-18 17:36:00,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273393162] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:00,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415881157] [2022-01-18 17:36:00,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:00,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:00,670 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 17:36:00,670 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 17:36:00,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:36:00,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:00,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:00,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:00,820 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 17:36:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:01,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:01,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:01,671 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 24 treesize of output 26 [2022-01-18 17:36:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415881157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:01,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:01,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:01,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447974412] [2022-01-18 17:36:01,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:01,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:01,756 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:04,224 INFO L93 Difference]: Finished difference Result 716 states and 1419 transitions. [2022-01-18 17:36:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:36:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:04,225 INFO L225 Difference]: With dead ends: 716 [2022-01-18 17:36:04,226 INFO L226 Difference]: Without dead ends: 701 [2022-01-18 17:36:04,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=728, Invalid=5592, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:36:04,226 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 224 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:04,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 417 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:36:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-18 17:36:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 402. [2022-01-18 17:36:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0149625935162097) internal successors, (808), 401 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 808 transitions. [2022-01-18 17:36:04,231 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 808 transitions. Word has length 30 [2022-01-18 17:36:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 808 transitions. [2022-01-18 17:36:04,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 808 transitions. [2022-01-18 17:36:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:04,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:04,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:04,247 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 17:36:04,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-01-18 17:36:04,432 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2095054305, now seen corresponding path program 70 times [2022-01-18 17:36:04,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:04,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9448379] [2022-01-18 17:36:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:04,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:04,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:04,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9448379] [2022-01-18 17:36:04,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9448379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:04,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782060497] [2022-01-18 17:36:04,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:04,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:04,792 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 17:36:04,793 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 17:36:04,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:04,974 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 17:36:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:05,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:05,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:05,731 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 24 treesize of output 26 [2022-01-18 17:36:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:05,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782060497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:05,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:05,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:36:05,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536058069] [2022-01-18 17:36:05,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:36:05,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:36:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:36:05,807 INFO L87 Difference]: Start difference. First operand 402 states and 808 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:08,378 INFO L93 Difference]: Finished difference Result 918 states and 1795 transitions. [2022-01-18 17:36:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:36:08,378 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:08,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:08,379 INFO L225 Difference]: With dead ends: 918 [2022-01-18 17:36:08,379 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 17:36:08,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=806, Invalid=6504, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:36:08,380 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 278 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:08,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 495 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:36:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 17:36:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 401. [2022-01-18 17:36:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0) internal successors, (800), 400 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:08,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 800 transitions. [2022-01-18 17:36:08,385 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 800 transitions. Word has length 30 [2022-01-18 17:36:08,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:08,385 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 800 transitions. [2022-01-18 17:36:08,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 800 transitions. [2022-01-18 17:36:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:08,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:08,386 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:08,400 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 17:36:08,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:08,586 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:08,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1311294601, now seen corresponding path program 71 times [2022-01-18 17:36:08,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:08,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930070583] [2022-01-18 17:36:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:08,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:08,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:08,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930070583] [2022-01-18 17:36:08,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930070583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:08,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377183173] [2022-01-18 17:36:08,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:08,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:08,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:08,912 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 17:36:08,912 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 17:36:08,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:08,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:09,068 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 17:36:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:09,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:09,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:09,835 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 24 treesize of output 26 [2022-01-18 17:36:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:09,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377183173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:09,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:09,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:09,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012573684] [2022-01-18 17:36:09,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:09,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:09,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:09,930 INFO L87 Difference]: Start difference. First operand 401 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:11,629 INFO L93 Difference]: Finished difference Result 781 states and 1533 transitions. [2022-01-18 17:36:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:36:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:36:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:11,630 INFO L225 Difference]: With dead ends: 781 [2022-01-18 17:36:11,630 INFO L226 Difference]: Without dead ends: 772 [2022-01-18 17:36:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=487, Invalid=4205, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:36:11,631 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:11,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 518 Invalid, 2176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:36:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-01-18 17:36:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 403. [2022-01-18 17:36:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.9975124378109452) internal successors, (803), 402 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 803 transitions. [2022-01-18 17:36:11,636 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 803 transitions. Word has length 30 [2022-01-18 17:36:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:11,636 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 803 transitions. [2022-01-18 17:36:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 803 transitions. [2022-01-18 17:36:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:11,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:11,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:11,652 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 17:36:11,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:11,837 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -429228877, now seen corresponding path program 72 times [2022-01-18 17:36:11,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:11,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473786581] [2022-01-18 17:36:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:11,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:12,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:12,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473786581] [2022-01-18 17:36:12,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473786581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:12,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659016772] [2022-01-18 17:36:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:12,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:12,145 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 17:36:12,146 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 17:36:12,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:36:12,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:12,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:12,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:12,301 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 17:36:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:12,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:13,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:13,116 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 24 treesize of output 26 [2022-01-18 17:36:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:13,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659016772] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:13,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:13,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:13,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001368254] [2022-01-18 17:36:13,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:13,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:13,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:13,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:13,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:13,206 INFO L87 Difference]: Start difference. First operand 403 states and 803 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:14,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:14,836 INFO L93 Difference]: Finished difference Result 651 states and 1290 transitions. [2022-01-18 17:36:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:36:14,836 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:36:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:14,837 INFO L225 Difference]: With dead ends: 651 [2022-01-18 17:36:14,837 INFO L226 Difference]: Without dead ends: 628 [2022-01-18 17:36:14,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=519, Invalid=4173, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:36:14,837 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 183 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:14,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 281 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:36:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-18 17:36:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 393. [2022-01-18 17:36:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-01-18 17:36:14,842 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-01-18 17:36:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-01-18 17:36:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-01-18 17:36:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:14,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:14,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:14,858 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 17:36:15,043 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,SelfDestructingSolverStorable84 [2022-01-18 17:36:15,043 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:15,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:15,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1307236527, now seen corresponding path program 73 times [2022-01-18 17:36:15,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:15,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700066696] [2022-01-18 17:36:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:15,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:15,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700066696] [2022-01-18 17:36:15,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700066696] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:15,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046898200] [2022-01-18 17:36:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:36:15,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:15,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:15,339 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 17:36:15,340 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 17:36:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:15,497 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 17:36:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:15,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:16,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:16,301 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 24 treesize of output 26 [2022-01-18 17:36:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:16,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046898200] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:16,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:16,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:16,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764026529] [2022-01-18 17:36:16,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:16,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:16,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:16,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:16,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:16,389 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:17,897 INFO L93 Difference]: Finished difference Result 794 states and 1569 transitions. [2022-01-18 17:36:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:36:17,897 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:17,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:17,898 INFO L225 Difference]: With dead ends: 794 [2022-01-18 17:36:17,898 INFO L226 Difference]: Without dead ends: 761 [2022-01-18 17:36:17,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=490, Invalid=4066, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:36:17,898 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 167 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:17,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 416 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:17,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-18 17:36:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2022-01-18 17:36:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.012853470437018) internal successors, (783), 389 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 783 transitions. [2022-01-18 17:36:17,904 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 783 transitions. Word has length 30 [2022-01-18 17:36:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 783 transitions. [2022-01-18 17:36:17,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 783 transitions. [2022-01-18 17:36:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:17,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:17,905 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:17,935 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 17:36:18,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:18,126 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash -821099023, now seen corresponding path program 74 times [2022-01-18 17:36:18,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573079587] [2022-01-18 17:36:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:18,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:18,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573079587] [2022-01-18 17:36:18,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573079587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015569561] [2022-01-18 17:36:18,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:36:18,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:18,431 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 17:36:18,431 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 17:36:18,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:18,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:18,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:18,586 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 17:36:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:18,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:19,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:19,367 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 24 treesize of output 26 [2022-01-18 17:36:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:19,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015569561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:19,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:19,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:19,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691911124] [2022-01-18 17:36:19,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:19,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:19,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:19,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:19,451 INFO L87 Difference]: Start difference. First operand 390 states and 783 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:20,727 INFO L93 Difference]: Finished difference Result 787 states and 1543 transitions. [2022-01-18 17:36:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:36:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:36:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:20,728 INFO L225 Difference]: With dead ends: 787 [2022-01-18 17:36:20,728 INFO L226 Difference]: Without dead ends: 778 [2022-01-18 17:36:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:36:20,728 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 145 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:20,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 400 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-18 17:36:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 404. [2022-01-18 17:36:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0074441687344913) internal successors, (809), 403 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 809 transitions. [2022-01-18 17:36:20,734 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 809 transitions. Word has length 30 [2022-01-18 17:36:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:20,734 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 809 transitions. [2022-01-18 17:36:20,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:20,734 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 809 transitions. [2022-01-18 17:36:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:20,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:20,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:20,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 17:36:20,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:20,935 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:20,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 60966701, now seen corresponding path program 75 times [2022-01-18 17:36:20,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447816498] [2022-01-18 17:36:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:20,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447816498] [2022-01-18 17:36:21,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447816498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:21,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397011210] [2022-01-18 17:36:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:21,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:21,268 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 17:36:21,269 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 17:36:21,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:36:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:21,449 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 17:36:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:21,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:22,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:22,322 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 24 treesize of output 26 [2022-01-18 17:36:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:22,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397011210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:22,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:22,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:22,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906753813] [2022-01-18 17:36:22,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:22,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:22,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:22,406 INFO L87 Difference]: Start difference. First operand 404 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:24,159 INFO L93 Difference]: Finished difference Result 898 states and 1751 transitions. [2022-01-18 17:36:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:36:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:36:24,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:24,160 INFO L225 Difference]: With dead ends: 898 [2022-01-18 17:36:24,161 INFO L226 Difference]: Without dead ends: 881 [2022-01-18 17:36:24,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 15 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=512, Invalid=4458, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:36:24,161 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 158 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:24,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 410 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1645 Invalid, 0 Unknown, 79 Unchecked, 0.6s Time] [2022-01-18 17:36:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-18 17:36:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 402. [2022-01-18 17:36:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-01-18 17:36:24,167 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-01-18 17:36:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:24,167 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-01-18 17:36:24,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-01-18 17:36:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:24,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:24,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:24,183 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 17:36:24,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-01-18 17:36:24,368 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:24,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1529633419, now seen corresponding path program 76 times [2022-01-18 17:36:24,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:24,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639272931] [2022-01-18 17:36:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:24,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:24,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639272931] [2022-01-18 17:36:24,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639272931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147530431] [2022-01-18 17:36:24,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:24,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:24,696 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 17:36:24,697 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 17:36:24,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:24,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:24,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:24,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:24,852 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 17:36:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:25,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:25,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:25,563 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 24 treesize of output 26 [2022-01-18 17:36:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:25,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147530431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:25,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:25,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:36:25,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706755822] [2022-01-18 17:36:25,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:25,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:36:25,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:25,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:36:25,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:36:25,659 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:26,792 INFO L93 Difference]: Finished difference Result 802 states and 1580 transitions. [2022-01-18 17:36:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:36:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:26,793 INFO L225 Difference]: With dead ends: 802 [2022-01-18 17:36:26,793 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 17:36:26,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=3263, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:36:26,793 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 152 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:26,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 364 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:36:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 17:36:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 394. [2022-01-18 17:36:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-01-18 17:36:26,799 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-01-18 17:36:26,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:26,799 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-01-18 17:36:26,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-01-18 17:36:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:26,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:26,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:26,815 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 17:36:27,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:27,000 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:27,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -817040949, now seen corresponding path program 77 times [2022-01-18 17:36:27,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:27,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13611411] [2022-01-18 17:36:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:27,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:27,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13611411] [2022-01-18 17:36:27,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13611411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716066532] [2022-01-18 17:36:27,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:27,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:27,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:27,306 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 17:36:27,306 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 17:36:27,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:27,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:27,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:27,461 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 17:36:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:27,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:28,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:28,256 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 24 treesize of output 26 [2022-01-18 17:36:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:28,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716066532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:28,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:28,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:28,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744187007] [2022-01-18 17:36:28,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:28,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:28,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:28,347 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:29,466 INFO L93 Difference]: Finished difference Result 785 states and 1549 transitions. [2022-01-18 17:36:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:36:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:29,467 INFO L225 Difference]: With dead ends: 785 [2022-01-18 17:36:29,467 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 17:36:29,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=388, Invalid=3394, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:36:29,468 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 134 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:29,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 439 Invalid, 1557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1176 Invalid, 0 Unknown, 323 Unchecked, 0.5s Time] [2022-01-18 17:36:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 17:36:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 392. [2022-01-18 17:36:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.0076726342710995) internal successors, (785), 391 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 785 transitions. [2022-01-18 17:36:29,473 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 785 transitions. Word has length 30 [2022-01-18 17:36:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:29,473 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 785 transitions. [2022-01-18 17:36:29,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 785 transitions. [2022-01-18 17:36:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:29,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:29,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:29,493 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 17:36:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:29,687 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1138417607, now seen corresponding path program 78 times [2022-01-18 17:36:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572462429] [2022-01-18 17:36:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:29,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:30,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:30,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572462429] [2022-01-18 17:36:30,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572462429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:30,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382750618] [2022-01-18 17:36:30,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:30,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:30,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:30,005 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 17:36:30,006 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 17:36:30,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:36:30,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:30,169 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 17:36:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:30,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:31,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:31,012 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 24 treesize of output 26 [2022-01-18 17:36:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:31,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382750618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:31,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:31,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:36:31,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076114648] [2022-01-18 17:36:31,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:31,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:36:31,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:36:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:36:31,098 INFO L87 Difference]: Start difference. First operand 392 states and 785 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:32,478 INFO L93 Difference]: Finished difference Result 783 states and 1545 transitions. [2022-01-18 17:36:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:36:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:32,480 INFO L225 Difference]: With dead ends: 783 [2022-01-18 17:36:32,480 INFO L226 Difference]: Without dead ends: 747 [2022-01-18 17:36:32,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=413, Invalid=3877, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:36:32,480 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:32,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 580 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:36:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-18 17:36:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 388. [2022-01-18 17:36:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-01-18 17:36:32,485 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-01-18 17:36:32,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:32,485 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-01-18 17:36:32,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:32,485 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-01-18 17:36:32,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:32,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:32,486 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:32,501 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 17:36:32,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:32,686 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1698717151, now seen corresponding path program 79 times [2022-01-18 17:36:32,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:32,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347795296] [2022-01-18 17:36:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:32,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:32,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347795296] [2022-01-18 17:36:32,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347795296] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565496680] [2022-01-18 17:36:32,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:36:32,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:32,986 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 17:36:32,987 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 17:36:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:33,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:33,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:33,168 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 17:36:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:33,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:33,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:33,982 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 24 treesize of output 26 [2022-01-18 17:36:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:34,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565496680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:34,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:34,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:34,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799108751] [2022-01-18 17:36:34,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:34,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:34,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:34,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:34,066 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:35,653 INFO L93 Difference]: Finished difference Result 800 states and 1571 transitions. [2022-01-18 17:36:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:36:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:35,654 INFO L225 Difference]: With dead ends: 800 [2022-01-18 17:36:35,654 INFO L226 Difference]: Without dead ends: 791 [2022-01-18 17:36:35,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=484, Invalid=4628, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:36:35,655 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 335 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:36:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-18 17:36:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 409. [2022-01-18 17:36:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0073529411764706) internal successors, (819), 408 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 819 transitions. [2022-01-18 17:36:35,660 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 819 transitions. Word has length 30 [2022-01-18 17:36:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 819 transitions. [2022-01-18 17:36:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 819 transitions. [2022-01-18 17:36:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:35,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:35,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:35,675 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 17:36:35,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-01-18 17:36:35,861 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash -816651427, now seen corresponding path program 80 times [2022-01-18 17:36:35,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:35,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451219815] [2022-01-18 17:36:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:35,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:36,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451219815] [2022-01-18 17:36:36,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451219815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:36,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071958399] [2022-01-18 17:36:36,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:36:36,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:36,170 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 17:36:36,171 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 17:36:36,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:36,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:36,354 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 17:36:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:36,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:37,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:37,252 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 29 [2022-01-18 17:36:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071958399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:37,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:36:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079416661] [2022-01-18 17:36:37,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:36:37,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:37,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:36:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:36:37,347 INFO L87 Difference]: Start difference. First operand 409 states and 819 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:39,463 INFO L93 Difference]: Finished difference Result 718 states and 1411 transitions. [2022-01-18 17:36:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:36:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:39,465 INFO L225 Difference]: With dead ends: 718 [2022-01-18 17:36:39,465 INFO L226 Difference]: Without dead ends: 703 [2022-01-18 17:36:39,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=625, Invalid=5381, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:36:39,465 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 2270 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:39,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 450 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:36:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-18 17:36:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 407. [2022-01-18 17:36:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-01-18 17:36:39,470 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-01-18 17:36:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:39,470 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-01-18 17:36:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-01-18 17:36:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:39,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:39,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:39,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-01-18 17:36:39,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:39,671 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash 652015291, now seen corresponding path program 81 times [2022-01-18 17:36:39,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6182144] [2022-01-18 17:36:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:39,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:39,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6182144] [2022-01-18 17:36:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6182144] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:39,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85400384] [2022-01-18 17:36:39,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:36:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:39,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:39,971 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 17:36:39,972 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 17:36:39,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:36:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:40,149 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 17:36:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:40,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:40,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:40,960 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 24 treesize of output 26 [2022-01-18 17:36:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:41,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85400384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:41,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:41,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:36:41,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648712292] [2022-01-18 17:36:41,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:41,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:36:41,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:36:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:36:41,048 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:42,725 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-01-18 17:36:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:36:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:42,726 INFO L225 Difference]: With dead ends: 825 [2022-01-18 17:36:42,726 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 17:36:42,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=497, Invalid=4473, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:36:42,727 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 204 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:42,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 408 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1558 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2022-01-18 17:36:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 17:36:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 405. [2022-01-18 17:36:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-01-18 17:36:42,732 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-01-18 17:36:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-01-18 17:36:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-01-18 17:36:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:42,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:42,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:42,748 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 17:36:42,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:42,934 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1573717431, now seen corresponding path program 82 times [2022-01-18 17:36:42,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:42,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158494468] [2022-01-18 17:36:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:42,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:43,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158494468] [2022-01-18 17:36:43,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158494468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:43,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433481998] [2022-01-18 17:36:43,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:36:43,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:43,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:43,245 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 17:36:43,245 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 17:36:43,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:36:43,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:43,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:43,427 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 17:36:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:43,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:44,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:44,176 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 24 treesize of output 26 [2022-01-18 17:36:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:44,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433481998] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:44,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:44,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:44,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249254213] [2022-01-18 17:36:44,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:44,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:44,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:44,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:44,266 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:45,896 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-01-18 17:36:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:36:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:45,897 INFO L225 Difference]: With dead ends: 804 [2022-01-18 17:36:45,897 INFO L226 Difference]: Without dead ends: 761 [2022-01-18 17:36:45,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=4354, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:36:45,898 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 150 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:45,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 488 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:36:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-18 17:36:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 393. [2022-01-18 17:36:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.010204081632653) internal successors, (788), 392 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 788 transitions. [2022-01-18 17:36:45,903 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 788 transitions. Word has length 30 [2022-01-18 17:36:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:45,903 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 788 transitions. [2022-01-18 17:36:45,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 788 transitions. [2022-01-18 17:36:45,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:45,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:45,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:45,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-18 17:36:46,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:46,104 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:46,104 INFO L85 PathProgramCache]: Analyzing trace with hash 298691911, now seen corresponding path program 83 times [2022-01-18 17:36:46,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:46,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151467838] [2022-01-18 17:36:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:46,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:46,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151467838] [2022-01-18 17:36:46,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151467838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663532726] [2022-01-18 17:36:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:36:46,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:46,487 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 17:36:46,488 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 17:36:46,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:36:46,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:46,686 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 17:36:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:46,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:47,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:47,463 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 24 treesize of output 26 [2022-01-18 17:36:47,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:47,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663532726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:47,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:47,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:47,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414506789] [2022-01-18 17:36:47,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:47,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:47,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:47,555 INFO L87 Difference]: Start difference. First operand 393 states and 788 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:49,720 INFO L93 Difference]: Finished difference Result 877 states and 1721 transitions. [2022-01-18 17:36:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:36:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:49,722 INFO L225 Difference]: With dead ends: 877 [2022-01-18 17:36:49,722 INFO L226 Difference]: Without dead ends: 868 [2022-01-18 17:36:49,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=611, Invalid=5551, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:36:49,723 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 220 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:49,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 450 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:36:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-18 17:36:49,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 407. [2022-01-18 17:36:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0123152709359604) internal successors, (817), 406 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 817 transitions. [2022-01-18 17:36:49,728 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 817 transitions. Word has length 30 [2022-01-18 17:36:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:49,728 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 817 transitions. [2022-01-18 17:36:49,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:49,728 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 817 transitions. [2022-01-18 17:36:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:49,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:49,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:49,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 17:36:49,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:49,929 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1180757635, now seen corresponding path program 84 times [2022-01-18 17:36:49,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:49,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293578890] [2022-01-18 17:36:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:49,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:50,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293578890] [2022-01-18 17:36:50,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293578890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368757895] [2022-01-18 17:36:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:36:50,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:50,241 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 17:36:50,242 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 17:36:50,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:36:50,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:50,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:36:50,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:50,441 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 17:36:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:50,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:51,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:51,280 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 24 treesize of output 26 [2022-01-18 17:36:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:51,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368757895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:51,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:51,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:51,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988271177] [2022-01-18 17:36:51,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:51,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:51,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:51,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:51,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:51,368 INFO L87 Difference]: Start difference. First operand 407 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:53,670 INFO L93 Difference]: Finished difference Result 746 states and 1474 transitions. [2022-01-18 17:36:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 17:36:53,670 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:53,671 INFO L225 Difference]: With dead ends: 746 [2022-01-18 17:36:53,671 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 17:36:53,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=658, Invalid=5504, Unknown=0, NotChecked=0, Total=6162 [2022-01-18 17:36:53,672 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:53,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 378 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:36:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 17:36:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 405. [2022-01-18 17:36:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-01-18 17:36:53,677 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-01-18 17:36:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:53,678 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-01-18 17:36:53,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-01-18 17:36:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:53,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:53,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:53,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-01-18 17:36:53,878 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,SelfDestructingSolverStorable96 [2022-01-18 17:36:53,879 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1645542943, now seen corresponding path program 85 times [2022-01-18 17:36:53,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:53,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775316755] [2022-01-18 17:36:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:53,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:54,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775316755] [2022-01-18 17:36:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775316755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:54,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746536208] [2022-01-18 17:36:54,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:36:54,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:54,195 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 17:36:54,195 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 17:36:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:54,381 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 17:36:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:54,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:55,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:55,231 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 24 treesize of output 26 [2022-01-18 17:36:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:55,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746536208] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:55,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:55,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:36:55,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476662520] [2022-01-18 17:36:55,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:55,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:36:55,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:36:55,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:36:55,311 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:57,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:36:57,406 INFO L93 Difference]: Finished difference Result 893 states and 1754 transitions. [2022-01-18 17:36:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 17:36:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:36:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:36:57,408 INFO L225 Difference]: With dead ends: 893 [2022-01-18 17:36:57,408 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 17:36:57,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=632, Invalid=5374, Unknown=0, NotChecked=0, Total=6006 [2022-01-18 17:36:57,408 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 229 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:36:57,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 426 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1746 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-01-18 17:36:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 17:36:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 404. [2022-01-18 17:36:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.9975186104218363) internal successors, (805), 403 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 805 transitions. [2022-01-18 17:36:57,413 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 805 transitions. Word has length 30 [2022-01-18 17:36:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:36:57,413 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 805 transitions. [2022-01-18 17:36:57,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:36:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 805 transitions. [2022-01-18 17:36:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:36:57,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:36:57,415 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:36:57,438 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 17:36:57,627 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,SelfDestructingSolverStorable97 [2022-01-18 17:36:57,627 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:36:57,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:36:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -756924553, now seen corresponding path program 86 times [2022-01-18 17:36:57,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:36:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243269632] [2022-01-18 17:36:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:36:57,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:36:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:36:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:57,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:36:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243269632] [2022-01-18 17:36:57,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243269632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:36:57,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520033652] [2022-01-18 17:36:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:36:57,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:36:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:36:57,942 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 17:36:57,942 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 17:36:57,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:36:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:36:57,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:36:57,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:36:58,141 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 17:36:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:58,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:36:58,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:36:58,977 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 24 treesize of output 26 [2022-01-18 17:36:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:36:59,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520033652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:36:59,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:36:59,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:36:59,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586891176] [2022-01-18 17:36:59,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:36:59,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:36:59,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:36:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:36:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:36:59,067 INFO L87 Difference]: Start difference. First operand 404 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:00,389 INFO L93 Difference]: Finished difference Result 778 states and 1525 transitions. [2022-01-18 17:37:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:37:00,389 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:00,390 INFO L225 Difference]: With dead ends: 778 [2022-01-18 17:37:00,390 INFO L226 Difference]: Without dead ends: 769 [2022-01-18 17:37:00,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=3647, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:37:00,391 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 138 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:00,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 411 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:37:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2022-01-18 17:37:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 406. [2022-01-18 17:37:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.9950617283950618) internal successors, (808), 405 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 808 transitions. [2022-01-18 17:37:00,396 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 808 transitions. Word has length 30 [2022-01-18 17:37:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:00,396 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 808 transitions. [2022-01-18 17:37:00,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 808 transitions. [2022-01-18 17:37:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:00,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:00,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:00,412 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 17:37:00,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:00,599 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash 125141171, now seen corresponding path program 87 times [2022-01-18 17:37:00,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:00,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360951362] [2022-01-18 17:37:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:00,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:00,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360951362] [2022-01-18 17:37:00,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360951362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:00,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376425076] [2022-01-18 17:37:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:37:00,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:00,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:00,915 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 17:37:00,916 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 17:37:00,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:37:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:01,103 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 17:37:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:01,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:01,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:01,971 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 24 treesize of output 26 [2022-01-18 17:37:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:02,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376425076] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:02,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:02,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:02,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895879887] [2022-01-18 17:37:02,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:02,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:02,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:02,061 INFO L87 Difference]: Start difference. First operand 406 states and 808 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:03,573 INFO L93 Difference]: Finished difference Result 666 states and 1317 transitions. [2022-01-18 17:37:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:37:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:03,574 INFO L225 Difference]: With dead ends: 666 [2022-01-18 17:37:03,574 INFO L226 Difference]: Without dead ends: 643 [2022-01-18 17:37:03,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=3623, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:37:03,574 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:03,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 422 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:37:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-18 17:37:03,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 396. [2022-01-18 17:37:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-01-18 17:37:03,579 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-01-18 17:37:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:03,579 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-01-18 17:37:03,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:03,579 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-01-18 17:37:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:03,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:03,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:03,595 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 17:37:03,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:03,780 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:03,781 INFO L85 PathProgramCache]: Analyzing trace with hash -752866479, now seen corresponding path program 88 times [2022-01-18 17:37:03,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447412086] [2022-01-18 17:37:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:03,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:04,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:04,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447412086] [2022-01-18 17:37:04,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447412086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:04,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051106887] [2022-01-18 17:37:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:37:04,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:04,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:04,087 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 17:37:04,088 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 17:37:04,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:37:04,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:04,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:04,275 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 17:37:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:04,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:05,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:05,064 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 24 treesize of output 26 [2022-01-18 17:37:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:05,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051106887] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:05,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:05,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:05,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015983070] [2022-01-18 17:37:05,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:05,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:05,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:05,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:05,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:05,152 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:06,340 INFO L93 Difference]: Finished difference Result 790 states and 1555 transitions. [2022-01-18 17:37:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:37:06,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:06,341 INFO L225 Difference]: With dead ends: 790 [2022-01-18 17:37:06,341 INFO L226 Difference]: Without dead ends: 753 [2022-01-18 17:37:06,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=389, Invalid=3517, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:37:06,341 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 128 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:06,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 383 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1246 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-01-18 17:37:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-18 17:37:06,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 392. [2022-01-18 17:37:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2022-01-18 17:37:06,346 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 30 [2022-01-18 17:37:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:06,346 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2022-01-18 17:37:06,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2022-01-18 17:37:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:06,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:06,347 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:06,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-18 17:37:06,547 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,SelfDestructingSolverStorable100 [2022-01-18 17:37:06,547 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash -922111945, now seen corresponding path program 89 times [2022-01-18 17:37:06,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:06,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749621335] [2022-01-18 17:37:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:06,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:06,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749621335] [2022-01-18 17:37:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749621335] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265225728] [2022-01-18 17:37:06,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:37:06,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:06,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:06,842 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 17:37:06,843 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 17:37:06,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:37:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:37:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:07,023 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 17:37:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:07,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:07,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:07,767 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 24 treesize of output 26 [2022-01-18 17:37:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:07,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265225728] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:07,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:07,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:07,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957214054] [2022-01-18 17:37:07,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:07,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:07,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:07,845 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:10,043 INFO L93 Difference]: Finished difference Result 867 states and 1705 transitions. [2022-01-18 17:37:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:37:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:10,044 INFO L225 Difference]: With dead ends: 867 [2022-01-18 17:37:10,044 INFO L226 Difference]: Without dead ends: 858 [2022-01-18 17:37:10,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=692, Invalid=5788, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:37:10,045 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:10,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 390 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:37:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-01-18 17:37:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 407. [2022-01-18 17:37:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-01-18 17:37:10,051 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-01-18 17:37:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:10,051 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-01-18 17:37:10,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-01-18 17:37:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:10,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:10,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:10,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 17:37:10,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:10,252 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash -40046221, now seen corresponding path program 90 times [2022-01-18 17:37:10,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:10,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298815030] [2022-01-18 17:37:10,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:10,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:10,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298815030] [2022-01-18 17:37:10,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298815030] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:10,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96226607] [2022-01-18 17:37:10,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:37:10,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:10,632 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 17:37:10,661 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 17:37:10,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:37:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:10,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:37:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:10,832 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 17:37:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:11,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:11,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:11,587 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 24 treesize of output 26 [2022-01-18 17:37:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96226607] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:11,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:11,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:11,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416350958] [2022-01-18 17:37:11,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:11,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:11,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:11,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:11,671 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:13,989 INFO L93 Difference]: Finished difference Result 724 states and 1435 transitions. [2022-01-18 17:37:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:37:13,989 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:13,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:13,990 INFO L225 Difference]: With dead ends: 724 [2022-01-18 17:37:13,990 INFO L226 Difference]: Without dead ends: 709 [2022-01-18 17:37:13,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=706, Invalid=5614, Unknown=0, NotChecked=0, Total=6320 [2022-01-18 17:37:13,990 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 246 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:13,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-01-18 17:37:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 405. [2022-01-18 17:37:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.014851485148515) internal successors, (814), 404 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 814 transitions. [2022-01-18 17:37:13,995 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 814 transitions. Word has length 30 [2022-01-18 17:37:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:13,995 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 814 transitions. [2022-01-18 17:37:13,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 814 transitions. [2022-01-18 17:37:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:13,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:13,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:14,010 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 17:37:14,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 17:37:14,196 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1428620497, now seen corresponding path program 91 times [2022-01-18 17:37:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762021927] [2022-01-18 17:37:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:14,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762021927] [2022-01-18 17:37:14,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762021927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:14,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769848129] [2022-01-18 17:37:14,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:14,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:14,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:14,494 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 17:37:14,495 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 17:37:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:14,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:14,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:14,669 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 17:37:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:14,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:15,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:15,368 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 24 treesize of output 26 [2022-01-18 17:37:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:15,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769848129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:15,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:15,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:37:15,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796893605] [2022-01-18 17:37:15,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:15,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:37:15,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:37:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:37:15,447 INFO L87 Difference]: Start difference. First operand 405 states and 814 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:17,930 INFO L93 Difference]: Finished difference Result 922 states and 1803 transitions. [2022-01-18 17:37:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-18 17:37:17,931 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:17,932 INFO L225 Difference]: With dead ends: 922 [2022-01-18 17:37:17,932 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 17:37:17,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=768, Invalid=6372, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 17:37:17,933 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 228 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:17,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 533 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:37:17,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 17:37:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 404. [2022-01-18 17:37:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0) internal successors, (806), 403 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 806 transitions. [2022-01-18 17:37:17,938 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 806 transitions. Word has length 30 [2022-01-18 17:37:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:17,938 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 806 transitions. [2022-01-18 17:37:17,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 806 transitions. [2022-01-18 17:37:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:17,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:17,939 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:17,954 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 17:37:18,139 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,SelfDestructingSolverStorable103 [2022-01-18 17:37:18,140 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:18,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1977728409, now seen corresponding path program 92 times [2022-01-18 17:37:18,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171603464] [2022-01-18 17:37:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:18,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171603464] [2022-01-18 17:37:18,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171603464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062130999] [2022-01-18 17:37:18,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:37:18,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:18,442 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 17:37:18,442 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 17:37:18,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:18,624 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 17:37:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:18,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:19,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:19,368 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 24 treesize of output 26 [2022-01-18 17:37:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:19,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062130999] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:19,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:19,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:19,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977042192] [2022-01-18 17:37:19,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:19,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:19,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:19,454 INFO L87 Difference]: Start difference. First operand 404 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:20,995 INFO L93 Difference]: Finished difference Result 786 states and 1543 transitions. [2022-01-18 17:37:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:37:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:20,996 INFO L225 Difference]: With dead ends: 786 [2022-01-18 17:37:20,996 INFO L226 Difference]: Without dead ends: 777 [2022-01-18 17:37:20,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=4220, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:37:20,997 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 153 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:20,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 399 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:37:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-18 17:37:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 406. [2022-01-18 17:37:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.997530864197531) internal successors, (809), 405 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 809 transitions. [2022-01-18 17:37:21,002 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 809 transitions. Word has length 30 [2022-01-18 17:37:21,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:21,002 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 809 transitions. [2022-01-18 17:37:21,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 809 transitions. [2022-01-18 17:37:21,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:21,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:21,003 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:21,017 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 17:37:21,203 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,SelfDestructingSolverStorable104 [2022-01-18 17:37:21,203 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1095662685, now seen corresponding path program 93 times [2022-01-18 17:37:21,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121700935] [2022-01-18 17:37:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:21,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:21,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:21,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121700935] [2022-01-18 17:37:21,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121700935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:21,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317906339] [2022-01-18 17:37:21,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:37:21,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:21,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:21,515 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 17:37:21,515 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 17:37:21,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:37:21,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:21,695 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 17:37:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:22,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:22,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:22,461 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 24 treesize of output 26 [2022-01-18 17:37:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:22,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317906339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:22,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:22,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:22,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789034123] [2022-01-18 17:37:22,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:22,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:22,540 INFO L87 Difference]: Start difference. First operand 406 states and 809 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:24,307 INFO L93 Difference]: Finished difference Result 659 states and 1306 transitions. [2022-01-18 17:37:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:37:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:24,309 INFO L225 Difference]: With dead ends: 659 [2022-01-18 17:37:24,309 INFO L226 Difference]: Without dead ends: 636 [2022-01-18 17:37:24,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=504, Invalid=4188, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:37:24,309 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:24,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 396 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-01-18 17:37:24,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 396. [2022-01-18 17:37:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.010126582278481) internal successors, (794), 395 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 794 transitions. [2022-01-18 17:37:24,313 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 794 transitions. Word has length 30 [2022-01-18 17:37:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:24,313 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 794 transitions. [2022-01-18 17:37:24,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 794 transitions. [2022-01-18 17:37:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:24,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:24,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:24,332 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 17:37:24,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:24,516 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1973670335, now seen corresponding path program 94 times [2022-01-18 17:37:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:24,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060816835] [2022-01-18 17:37:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:24,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:24,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:24,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060816835] [2022-01-18 17:37:24,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060816835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508401167] [2022-01-18 17:37:24,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:37:24,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:24,815 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 17:37:24,815 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 17:37:24,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:37:24,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:24,997 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 17:37:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:25,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:25,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:25,737 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 24 treesize of output 26 [2022-01-18 17:37:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508401167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:25,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:25,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:25,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165289630] [2022-01-18 17:37:25,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:25,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:25,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:25,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:25,818 INFO L87 Difference]: Start difference. First operand 396 states and 794 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:27,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:27,413 INFO L93 Difference]: Finished difference Result 799 states and 1579 transitions. [2022-01-18 17:37:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:37:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:27,414 INFO L225 Difference]: With dead ends: 799 [2022-01-18 17:37:27,414 INFO L226 Difference]: Without dead ends: 766 [2022-01-18 17:37:27,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=4081, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:37:27,414 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1787 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:27,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 464 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1787 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-01-18 17:37:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 393. [2022-01-18 17:37:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.0127551020408165) internal successors, (789), 392 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 789 transitions. [2022-01-18 17:37:27,419 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 789 transitions. Word has length 30 [2022-01-18 17:37:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:27,419 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 789 transitions. [2022-01-18 17:37:27,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 789 transitions. [2022-01-18 17:37:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:27,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:27,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:27,435 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 17:37:27,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:27,620 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1487532831, now seen corresponding path program 95 times [2022-01-18 17:37:27,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222549016] [2022-01-18 17:37:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:27,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:27,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:27,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222549016] [2022-01-18 17:37:27,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222549016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:27,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577208799] [2022-01-18 17:37:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:37:27,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:27,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:27,921 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 17:37:27,921 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 17:37:27,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:27,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:27,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:28,103 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 17:37:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:28,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:28,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:28,847 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 24 treesize of output 26 [2022-01-18 17:37:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:28,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577208799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:28,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:28,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:28,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572889876] [2022-01-18 17:37:28,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:28,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:28,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:28,934 INFO L87 Difference]: Start difference. First operand 393 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:30,304 INFO L93 Difference]: Finished difference Result 792 states and 1553 transitions. [2022-01-18 17:37:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:37:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:30,305 INFO L225 Difference]: With dead ends: 792 [2022-01-18 17:37:30,305 INFO L226 Difference]: Without dead ends: 783 [2022-01-18 17:37:30,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=392, Invalid=3768, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:37:30,305 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 133 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:30,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 483 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-18 17:37:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 407. [2022-01-18 17:37:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0073891625615765) internal successors, (815), 406 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 815 transitions. [2022-01-18 17:37:30,310 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 815 transitions. Word has length 30 [2022-01-18 17:37:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:30,310 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 815 transitions. [2022-01-18 17:37:30,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 815 transitions. [2022-01-18 17:37:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:30,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:30,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:30,326 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 17:37:30,511 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,SelfDestructingSolverStorable107 [2022-01-18 17:37:30,511 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -605467107, now seen corresponding path program 96 times [2022-01-18 17:37:30,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478664029] [2022-01-18 17:37:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:30,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:30,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478664029] [2022-01-18 17:37:30,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478664029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658714009] [2022-01-18 17:37:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:37:30,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:30,813 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 17:37:30,814 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 17:37:30,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:37:30,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:31,004 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 17:37:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:31,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:31,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:31,773 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 24 treesize of output 26 [2022-01-18 17:37:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:31,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658714009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:31,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:31,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:31,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514495391] [2022-01-18 17:37:31,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:31,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:31,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:31,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:31,881 INFO L87 Difference]: Start difference. First operand 407 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:33,348 INFO L93 Difference]: Finished difference Result 682 states and 1351 transitions. [2022-01-18 17:37:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:37:33,348 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:33,349 INFO L225 Difference]: With dead ends: 682 [2022-01-18 17:37:33,349 INFO L226 Difference]: Without dead ends: 667 [2022-01-18 17:37:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=3742, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:37:33,349 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:33,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 391 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:37:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-18 17:37:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 405. [2022-01-18 17:37:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.007425742574257) internal successors, (811), 404 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 811 transitions. [2022-01-18 17:37:33,354 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 811 transitions. Word has length 30 [2022-01-18 17:37:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:33,354 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 811 transitions. [2022-01-18 17:37:33,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 811 transitions. [2022-01-18 17:37:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:33,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:33,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:33,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 17:37:33,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:33,555 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash 863199611, now seen corresponding path program 97 times [2022-01-18 17:37:33,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:33,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882333379] [2022-01-18 17:37:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:33,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:33,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882333379] [2022-01-18 17:37:33,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882333379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838877808] [2022-01-18 17:37:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:33,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:33,874 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 17:37:33,874 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 17:37:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:33,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:34,046 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 17:37:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:34,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:34,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:34,811 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 24 treesize of output 26 [2022-01-18 17:37:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:34,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838877808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:34,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:34,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:37:34,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958864423] [2022-01-18 17:37:34,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:34,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:37:34,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:37:34,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:37:34,893 INFO L87 Difference]: Start difference. First operand 405 states and 811 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:36,173 INFO L93 Difference]: Finished difference Result 807 states and 1590 transitions. [2022-01-18 17:37:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:37:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:36,174 INFO L225 Difference]: With dead ends: 807 [2022-01-18 17:37:36,174 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 17:37:36,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=3278, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:37:36,174 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:36,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 546 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1782 Invalid, 0 Unknown, 43 Unchecked, 0.6s Time] [2022-01-18 17:37:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 17:37:36,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 397. [2022-01-18 17:37:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-01-18 17:37:36,179 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-01-18 17:37:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:36,180 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-01-18 17:37:36,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-01-18 17:37:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:36,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:36,180 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:36,196 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 17:37:36,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:36,381 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:36,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1483474757, now seen corresponding path program 98 times [2022-01-18 17:37:36,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:36,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240522032] [2022-01-18 17:37:36,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:36,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:36,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240522032] [2022-01-18 17:37:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240522032] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116411969] [2022-01-18 17:37:36,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:37:36,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:36,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:36,680 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 17:37:36,680 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 17:37:36,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:36,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:36,864 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 17:37:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:37,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:37,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:37,593 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 24 treesize of output 26 [2022-01-18 17:37:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:37,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116411969] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:37,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:37,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:37,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769400605] [2022-01-18 17:37:37,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:37,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:37,672 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:38,724 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-01-18 17:37:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:37:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:38,726 INFO L225 Difference]: With dead ends: 790 [2022-01-18 17:37:38,726 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 17:37:38,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=373, Invalid=3409, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:37:38,726 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:38,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 337 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 17:37:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 17:37:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 395. [2022-01-18 17:37:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-01-18 17:37:38,731 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-01-18 17:37:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:38,731 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-01-18 17:37:38,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-01-18 17:37:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:38,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:38,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:38,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-18 17:37:38,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:38,932 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:38,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:38,932 INFO L85 PathProgramCache]: Analyzing trace with hash 471983799, now seen corresponding path program 99 times [2022-01-18 17:37:38,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370818943] [2022-01-18 17:37:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:38,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:39,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:39,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370818943] [2022-01-18 17:37:39,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370818943] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:39,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085731692] [2022-01-18 17:37:39,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:37:39,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:39,246 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 17:37:39,246 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 17:37:39,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:37:39,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:39,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:39,436 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 17:37:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:39,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:40,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:40,256 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 24 treesize of output 26 [2022-01-18 17:37:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:40,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085731692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:40,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:40,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:37:40,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919993818] [2022-01-18 17:37:40,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:40,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:37:40,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:37:40,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:37:40,346 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:41,572 INFO L93 Difference]: Finished difference Result 788 states and 1555 transitions. [2022-01-18 17:37:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:37:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:41,573 INFO L225 Difference]: With dead ends: 788 [2022-01-18 17:37:41,573 INFO L226 Difference]: Without dead ends: 752 [2022-01-18 17:37:41,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=3892, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:37:41,574 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:41,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 422 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:37:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-18 17:37:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 391. [2022-01-18 17:37:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.01025641025641) internal successors, (784), 390 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 784 transitions. [2022-01-18 17:37:41,578 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 784 transitions. Word has length 30 [2022-01-18 17:37:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:41,579 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 784 transitions. [2022-01-18 17:37:41,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 784 transitions. [2022-01-18 17:37:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:41,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:41,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:41,595 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 17:37:41,779 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,SelfDestructingSolverStorable111 [2022-01-18 17:37:41,780 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 758969475, now seen corresponding path program 100 times [2022-01-18 17:37:41,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038996395] [2022-01-18 17:37:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:41,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:42,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038996395] [2022-01-18 17:37:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038996395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:42,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374051915] [2022-01-18 17:37:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:37:42,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:42,076 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 17:37:42,077 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 17:37:42,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:37:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:42,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:42,289 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 17:37:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:42,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:43,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:43,018 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 24 treesize of output 26 [2022-01-18 17:37:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:43,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374051915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:43,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:43,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:43,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985730063] [2022-01-18 17:37:43,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:43,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:43,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:43,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:43,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:43,104 INFO L87 Difference]: Start difference. First operand 391 states and 784 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:45,769 INFO L93 Difference]: Finished difference Result 989 states and 1946 transitions. [2022-01-18 17:37:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 17:37:45,769 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:45,770 INFO L225 Difference]: With dead ends: 989 [2022-01-18 17:37:45,770 INFO L226 Difference]: Without dead ends: 980 [2022-01-18 17:37:45,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2274 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=801, Invalid=6681, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 17:37:45,771 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 285 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:45,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 494 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:37:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-01-18 17:37:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 409. [2022-01-18 17:37:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0220588235294117) internal successors, (825), 408 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 825 transitions. [2022-01-18 17:37:45,776 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 825 transitions. Word has length 30 [2022-01-18 17:37:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 825 transitions. [2022-01-18 17:37:45,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 825 transitions. [2022-01-18 17:37:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:45,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:45,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:45,792 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 17:37:45,977 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,SelfDestructingSolverStorable112 [2022-01-18 17:37:45,977 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1641035199, now seen corresponding path program 101 times [2022-01-18 17:37:45,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:45,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452817487] [2022-01-18 17:37:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:45,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:46,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452817487] [2022-01-18 17:37:46,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452817487] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:46,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117510797] [2022-01-18 17:37:46,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:37:46,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:46,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:46,279 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 17:37:46,279 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 17:37:46,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:37:46,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:37:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:46,488 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 17:37:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:46,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:47,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:47,314 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 24 treesize of output 26 [2022-01-18 17:37:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117510797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:47,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:47,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:47,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782136158] [2022-01-18 17:37:47,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:47,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:47,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:47,394 INFO L87 Difference]: Start difference. First operand 409 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:50,320 INFO L93 Difference]: Finished difference Result 824 states and 1632 transitions. [2022-01-18 17:37:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:37:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:50,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:50,321 INFO L225 Difference]: With dead ends: 824 [2022-01-18 17:37:50,321 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 17:37:50,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2243 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=819, Invalid=6491, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:37:50,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:50,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 473 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:37:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 17:37:50,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 407. [2022-01-18 17:37:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.022167487684729) internal successors, (821), 406 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 821 transitions. [2022-01-18 17:37:50,327 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 821 transitions. Word has length 30 [2022-01-18 17:37:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:50,327 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 821 transitions. [2022-01-18 17:37:50,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 821 transitions. [2022-01-18 17:37:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:50,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:50,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:50,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 17:37:50,528 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,SelfDestructingSolverStorable113 [2022-01-18 17:37:50,528 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1185265379, now seen corresponding path program 102 times [2022-01-18 17:37:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488220452] [2022-01-18 17:37:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:50,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:50,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:50,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488220452] [2022-01-18 17:37:50,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488220452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:50,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263780119] [2022-01-18 17:37:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:37:50,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:50,828 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 17:37:50,828 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 17:37:50,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:37:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:37:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:51,031 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 17:37:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:51,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:51,802 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:51,802 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 24 treesize of output 26 [2022-01-18 17:37:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:51,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263780119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:51,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:51,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:37:51,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224403308] [2022-01-18 17:37:51,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:51,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:37:51,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:37:51,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:37:51,885 INFO L87 Difference]: Start difference. First operand 407 states and 821 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:54,699 INFO L93 Difference]: Finished difference Result 1053 states and 2058 transitions. [2022-01-18 17:37:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-18 17:37:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:37:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:54,700 INFO L225 Difference]: With dead ends: 1053 [2022-01-18 17:37:54,700 INFO L226 Difference]: Without dead ends: 992 [2022-01-18 17:37:54,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=877, Invalid=7313, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 17:37:54,701 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 348 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:54,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 506 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2227 Invalid, 0 Unknown, 84 Unchecked, 0.9s Time] [2022-01-18 17:37:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-18 17:37:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 406. [2022-01-18 17:37:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0074074074074075) internal successors, (813), 405 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 813 transitions. [2022-01-18 17:37:54,706 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 813 transitions. Word has length 30 [2022-01-18 17:37:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:54,706 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 813 transitions. [2022-01-18 17:37:54,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 813 transitions. [2022-01-18 17:37:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:54,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:54,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:54,722 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 17:37:54,907 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,SelfDestructingSolverStorable114 [2022-01-18 17:37:54,907 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:54,908 INFO L85 PathProgramCache]: Analyzing trace with hash -296646989, now seen corresponding path program 103 times [2022-01-18 17:37:54,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:54,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168156059] [2022-01-18 17:37:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:54,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:55,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168156059] [2022-01-18 17:37:55,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168156059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:55,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041619926] [2022-01-18 17:37:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:37:55,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:55,205 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 17:37:55,206 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 17:37:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:55,413 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 17:37:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:55,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:56,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:56,214 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 24 treesize of output 26 [2022-01-18 17:37:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:56,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041619926] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:56,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:56,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:56,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423581743] [2022-01-18 17:37:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:56,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:56,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:56,305 INFO L87 Difference]: Start difference. First operand 406 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:37:58,171 INFO L93 Difference]: Finished difference Result 839 states and 1652 transitions. [2022-01-18 17:37:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:37:58,172 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:37:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:37:58,173 INFO L225 Difference]: With dead ends: 839 [2022-01-18 17:37:58,173 INFO L226 Difference]: Without dead ends: 830 [2022-01-18 17:37:58,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=535, Invalid=4867, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:37:58,173 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 202 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:37:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 402 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:37:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-18 17:37:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 408. [2022-01-18 17:37:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.004914004914005) internal successors, (816), 407 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 816 transitions. [2022-01-18 17:37:58,178 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 816 transitions. Word has length 30 [2022-01-18 17:37:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:37:58,178 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 816 transitions. [2022-01-18 17:37:58,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:37:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 816 transitions. [2022-01-18 17:37:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:37:58,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:37:58,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:37:58,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-18 17:37:58,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:58,380 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:37:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:37:58,380 INFO L85 PathProgramCache]: Analyzing trace with hash 585418735, now seen corresponding path program 104 times [2022-01-18 17:37:58,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:37:58,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822902231] [2022-01-18 17:37:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:37:58,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:37:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:37:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:58,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:37:58,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822902231] [2022-01-18 17:37:58,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822902231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:37:58,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819689967] [2022-01-18 17:37:58,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:37:58,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:37:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:37:58,689 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 17:37:58,689 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 17:37:58,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:37:58,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:37:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:37:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:37:58,896 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 17:37:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:59,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:37:59,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:37:59,649 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 24 treesize of output 26 [2022-01-18 17:37:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:37:59,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819689967] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:37:59,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:37:59,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:37:59,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595785293] [2022-01-18 17:37:59,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:37:59,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:37:59,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:37:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:37:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:37:59,737 INFO L87 Difference]: Start difference. First operand 408 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:01,705 INFO L93 Difference]: Finished difference Result 706 states and 1396 transitions. [2022-01-18 17:38:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:38:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:38:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:01,706 INFO L225 Difference]: With dead ends: 706 [2022-01-18 17:38:01,706 INFO L226 Difference]: Without dead ends: 673 [2022-01-18 17:38:01,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1603 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=589, Invalid=5111, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:38:01,707 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 241 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:01,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 304 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1490 Invalid, 0 Unknown, 149 Unchecked, 0.6s Time] [2022-01-18 17:38:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-18 17:38:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 398. [2022-01-18 17:38:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.017632241813602) internal successors, (801), 397 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 801 transitions. [2022-01-18 17:38:01,711 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 801 transitions. Word has length 30 [2022-01-18 17:38:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:01,711 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 801 transitions. [2022-01-18 17:38:01,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 801 transitions. [2022-01-18 17:38:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:01,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:01,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:01,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 17:38:01,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:01,912 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -292588915, now seen corresponding path program 105 times [2022-01-18 17:38:01,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:01,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161137649] [2022-01-18 17:38:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:01,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:02,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161137649] [2022-01-18 17:38:02,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161137649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:02,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855967500] [2022-01-18 17:38:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:02,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:02,210 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 17:38:02,210 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 17:38:02,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:38:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:02,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:02,418 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 17:38:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:02,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:03,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:03,146 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 24 treesize of output 26 [2022-01-18 17:38:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:03,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855967500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:03,236 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:03,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:03,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23920472] [2022-01-18 17:38:03,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:03,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:03,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:03,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:03,237 INFO L87 Difference]: Start difference. First operand 398 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:05,305 INFO L93 Difference]: Finished difference Result 852 states and 1688 transitions. [2022-01-18 17:38:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:38:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:05,307 INFO L225 Difference]: With dead ends: 852 [2022-01-18 17:38:05,307 INFO L226 Difference]: Without dead ends: 819 [2022-01-18 17:38:05,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=536, Invalid=4720, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:38:05,307 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 178 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:05,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 579 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:38:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-18 17:38:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 395. [2022-01-18 17:38:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.020304568527919) internal successors, (796), 394 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 796 transitions. [2022-01-18 17:38:05,313 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 796 transitions. Word has length 30 [2022-01-18 17:38:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:05,313 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 796 transitions. [2022-01-18 17:38:05,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 796 transitions. [2022-01-18 17:38:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:05,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:05,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:05,328 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 17:38:05,514 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,SelfDestructingSolverStorable117 [2022-01-18 17:38:05,514 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash 193548589, now seen corresponding path program 106 times [2022-01-18 17:38:05,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:05,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997317527] [2022-01-18 17:38:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:05,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:05,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:05,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997317527] [2022-01-18 17:38:05,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997317527] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:05,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408643279] [2022-01-18 17:38:05,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:38:05,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:05,813 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 17:38:05,813 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 17:38:05,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:38:05,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:06,023 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 17:38:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:06,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:06,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:06,750 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 24 treesize of output 26 [2022-01-18 17:38:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:06,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408643279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:06,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:06,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:06,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879517303] [2022-01-18 17:38:06,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:06,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:06,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:06,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:06,838 INFO L87 Difference]: Start difference. First operand 395 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:08,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:08,727 INFO L93 Difference]: Finished difference Result 836 states and 1644 transitions. [2022-01-18 17:38:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:38:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:38:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:08,728 INFO L225 Difference]: With dead ends: 836 [2022-01-18 17:38:08,728 INFO L226 Difference]: Without dead ends: 827 [2022-01-18 17:38:08,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=463, Invalid=4649, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:38:08,729 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 161 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:08,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 547 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:38:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-18 17:38:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 409. [2022-01-18 17:38:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.014705882352941) internal successors, (822), 408 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 822 transitions. [2022-01-18 17:38:08,734 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 822 transitions. Word has length 30 [2022-01-18 17:38:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:08,735 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 822 transitions. [2022-01-18 17:38:08,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 822 transitions. [2022-01-18 17:38:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:08,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:08,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:08,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:08,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:08,936 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1075614313, now seen corresponding path program 107 times [2022-01-18 17:38:08,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:08,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524344028] [2022-01-18 17:38:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:08,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:09,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524344028] [2022-01-18 17:38:09,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524344028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:09,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307261970] [2022-01-18 17:38:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:38:09,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:09,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:09,246 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 17:38:09,246 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 17:38:09,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:09,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:09,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:09,454 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 17:38:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:09,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:10,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:10,265 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 24 treesize of output 26 [2022-01-18 17:38:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:10,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307261970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:10,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:10,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:10,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069581777] [2022-01-18 17:38:10,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:10,355 INFO L87 Difference]: Start difference. First operand 409 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:12,253 INFO L93 Difference]: Finished difference Result 717 states and 1424 transitions. [2022-01-18 17:38:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:38:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:12,254 INFO L225 Difference]: With dead ends: 717 [2022-01-18 17:38:12,254 INFO L226 Difference]: Without dead ends: 702 [2022-01-18 17:38:12,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=497, Invalid=4615, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:38:12,255 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:12,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 366 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:38:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-18 17:38:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 407. [2022-01-18 17:38:12,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0147783251231526) internal successors, (818), 406 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 818 transitions. [2022-01-18 17:38:12,259 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 818 transitions. Word has length 30 [2022-01-18 17:38:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:12,259 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 818 transitions. [2022-01-18 17:38:12,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 818 transitions. [2022-01-18 17:38:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:12,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:12,260 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:12,275 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 17:38:12,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:12,460 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1750686265, now seen corresponding path program 108 times [2022-01-18 17:38:12,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:12,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64315153] [2022-01-18 17:38:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:12,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:12,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64315153] [2022-01-18 17:38:12,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64315153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957849830] [2022-01-18 17:38:12,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:38:12,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:12,758 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 17:38:12,759 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 17:38:12,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:38:12,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:12,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:12,964 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 17:38:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:13,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:13,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:13,640 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 24 treesize of output 26 [2022-01-18 17:38:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957849830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:13,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:38:13,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383811250] [2022-01-18 17:38:13,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:38:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:38:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:38:13,718 INFO L87 Difference]: Start difference. First operand 407 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:15,322 INFO L93 Difference]: Finished difference Result 851 states and 1681 transitions. [2022-01-18 17:38:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:38:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:15,323 INFO L225 Difference]: With dead ends: 851 [2022-01-18 17:38:15,324 INFO L226 Difference]: Without dead ends: 806 [2022-01-18 17:38:15,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=4103, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:38:15,324 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:15,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 469 Invalid, 1979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:38:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-01-18 17:38:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 399. [2022-01-18 17:38:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0150753768844223) internal successors, (802), 398 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:15,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 802 transitions. [2022-01-18 17:38:15,330 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 802 transitions. Word has length 30 [2022-01-18 17:38:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:15,330 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 802 transitions. [2022-01-18 17:38:15,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 802 transitions. [2022-01-18 17:38:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:15,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:15,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:15,345 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 17:38:15,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:15,532 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash 197606663, now seen corresponding path program 109 times [2022-01-18 17:38:15,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029936082] [2022-01-18 17:38:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:15,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:15,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029936082] [2022-01-18 17:38:15,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029936082] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:15,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102507315] [2022-01-18 17:38:15,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:38:15,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:15,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:15,823 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 17:38:15,823 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 17:38:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:15,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:16,037 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 17:38:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:16,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:16,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:16,741 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 24 treesize of output 26 [2022-01-18 17:38:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:16,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102507315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:16,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:16,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:16,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868989611] [2022-01-18 17:38:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:16,833 INFO L87 Difference]: Start difference. First operand 399 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:18,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:18,484 INFO L93 Difference]: Finished difference Result 834 states and 1650 transitions. [2022-01-18 17:38:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:38:18,484 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:18,485 INFO L225 Difference]: With dead ends: 834 [2022-01-18 17:38:18,485 INFO L226 Difference]: Without dead ends: 801 [2022-01-18 17:38:18,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=444, Invalid=4248, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:38:18,486 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:18,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 506 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:38:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-18 17:38:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 397. [2022-01-18 17:38:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.015151515151515) internal successors, (798), 396 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 798 transitions. [2022-01-18 17:38:18,491 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 798 transitions. Word has length 30 [2022-01-18 17:38:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:18,491 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 798 transitions. [2022-01-18 17:38:18,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 798 transitions. [2022-01-18 17:38:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:18,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:18,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:18,506 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 17:38:18,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:18,692 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash -2141902077, now seen corresponding path program 110 times [2022-01-18 17:38:18,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:18,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076203810] [2022-01-18 17:38:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:18,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:19,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076203810] [2022-01-18 17:38:19,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076203810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:19,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685176757] [2022-01-18 17:38:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:38:19,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:19,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:19,002 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 17:38:19,003 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 17:38:19,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:19,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:19,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:19,216 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 17:38:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:19,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:19,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:19,987 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 24 treesize of output 26 [2022-01-18 17:38:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:20,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685176757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:20,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:20,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:38:20,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022968089] [2022-01-18 17:38:20,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:20,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:38:20,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:20,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:38:20,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:38:20,068 INFO L87 Difference]: Start difference. First operand 397 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:21,706 INFO L93 Difference]: Finished difference Result 835 states and 1651 transitions. [2022-01-18 17:38:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:21,707 INFO L225 Difference]: With dead ends: 835 [2022-01-18 17:38:21,707 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 17:38:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=469, Invalid=4787, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:38:21,708 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:21,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 463 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:38:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 17:38:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 394. [2022-01-18 17:38:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.017811704834606) internal successors, (793), 393 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 793 transitions. [2022-01-18 17:38:21,713 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 793 transitions. Word has length 30 [2022-01-18 17:38:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:21,713 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 793 transitions. [2022-01-18 17:38:21,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 793 transitions. [2022-01-18 17:38:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:21,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:21,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:21,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-18 17:38:21,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 17:38:21,914 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1485056713, now seen corresponding path program 111 times [2022-01-18 17:38:21,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:21,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719311557] [2022-01-18 17:38:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:21,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:22,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:22,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719311557] [2022-01-18 17:38:22,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719311557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:22,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397173642] [2022-01-18 17:38:22,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:22,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:22,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:22,225 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 17:38:22,225 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 17:38:22,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:38:22,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:22,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:22,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:22,466 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 17:38:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:22,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:23,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:23,147 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 24 treesize of output 26 [2022-01-18 17:38:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:23,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397173642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:23,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:23,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:23,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088055759] [2022-01-18 17:38:23,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:23,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:23,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:23,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:23,239 INFO L87 Difference]: Start difference. First operand 394 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:24,759 INFO L93 Difference]: Finished difference Result 839 states and 1642 transitions. [2022-01-18 17:38:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:38:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:24,760 INFO L225 Difference]: With dead ends: 839 [2022-01-18 17:38:24,760 INFO L226 Difference]: Without dead ends: 830 [2022-01-18 17:38:24,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=394, Invalid=4298, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:38:24,761 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 162 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:24,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 500 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:38:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-01-18 17:38:24,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 423. [2022-01-18 17:38:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.0118483412322274) internal successors, (849), 422 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:24,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 849 transitions. [2022-01-18 17:38:24,766 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 849 transitions. Word has length 30 [2022-01-18 17:38:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:24,766 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 849 transitions. [2022-01-18 17:38:24,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 849 transitions. [2022-01-18 17:38:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:24,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:24,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:24,781 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 17:38:24,967 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,SelfDestructingSolverStorable123 [2022-01-18 17:38:24,967 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash -602990989, now seen corresponding path program 112 times [2022-01-18 17:38:24,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:24,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564997085] [2022-01-18 17:38:24,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:24,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:25,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564997085] [2022-01-18 17:38:25,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564997085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977979771] [2022-01-18 17:38:25,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:38:25,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:25,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:25,279 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 17:38:25,280 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 17:38:25,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:38:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:25,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:25,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:25,512 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 17:38:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:26,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:26,211 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 24 treesize of output 26 [2022-01-18 17:38:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:26,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977979771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:26,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:26,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:26,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542003462] [2022-01-18 17:38:26,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:26,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:26,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:26,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:26,297 INFO L87 Difference]: Start difference. First operand 423 states and 849 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:28,195 INFO L93 Difference]: Finished difference Result 697 states and 1374 transitions. [2022-01-18 17:38:28,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:38:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:38:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:28,196 INFO L225 Difference]: With dead ends: 697 [2022-01-18 17:38:28,196 INFO L226 Difference]: Without dead ends: 682 [2022-01-18 17:38:28,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=432, Invalid=4398, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:38:28,196 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 155 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 542 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:38:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-01-18 17:38:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 419. [2022-01-18 17:38:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.011961722488038) internal successors, (841), 418 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 841 transitions. [2022-01-18 17:38:28,201 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 841 transitions. Word has length 30 [2022-01-18 17:38:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:28,201 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 841 transitions. [2022-01-18 17:38:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 841 transitions. [2022-01-18 17:38:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:28,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:28,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:28,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-18 17:38:28,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:28,402 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 865675729, now seen corresponding path program 113 times [2022-01-18 17:38:28,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213219651] [2022-01-18 17:38:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:28,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:28,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213219651] [2022-01-18 17:38:28,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213219651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:28,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620303509] [2022-01-18 17:38:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:38:28,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:28,705 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 17:38:28,705 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 17:38:28,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:38:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:28,927 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 17:38:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:29,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:29,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:29,647 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 24 treesize of output 26 [2022-01-18 17:38:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:29,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620303509] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:29,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:38:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634631082] [2022-01-18 17:38:29,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:29,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:38:29,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:38:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:38:29,729 INFO L87 Difference]: Start difference. First operand 419 states and 841 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:31,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:31,099 INFO L93 Difference]: Finished difference Result 862 states and 1690 transitions. [2022-01-18 17:38:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:38:31,099 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:31,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:31,100 INFO L225 Difference]: With dead ends: 862 [2022-01-18 17:38:31,100 INFO L226 Difference]: Without dead ends: 817 [2022-01-18 17:38:31,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=3539, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:38:31,100 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:31,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 531 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1888 Invalid, 0 Unknown, 157 Unchecked, 0.7s Time] [2022-01-18 17:38:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-01-18 17:38:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 406. [2022-01-18 17:38:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-01-18 17:38:31,106 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-01-18 17:38:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:31,106 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-01-18 17:38:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-01-18 17:38:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:31,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:31,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:31,121 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 17:38:31,306 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,SelfDestructingSolverStorable125 [2022-01-18 17:38:31,307 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1480998639, now seen corresponding path program 114 times [2022-01-18 17:38:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83847692] [2022-01-18 17:38:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:31,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83847692] [2022-01-18 17:38:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83847692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137969541] [2022-01-18 17:38:31,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:38:31,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:31,596 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 17:38:31,596 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 17:38:31,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:38:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:31,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:31,835 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 17:38:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:32,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:32,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:32,532 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 24 treesize of output 26 [2022-01-18 17:38:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:32,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137969541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:32,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:32,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:38:32,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563628048] [2022-01-18 17:38:32,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:32,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:38:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:38:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:38:32,621 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:34,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:34,235 INFO L93 Difference]: Finished difference Result 866 states and 1694 transitions. [2022-01-18 17:38:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:34,235 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:34,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:34,236 INFO L225 Difference]: With dead ends: 866 [2022-01-18 17:38:34,236 INFO L226 Difference]: Without dead ends: 833 [2022-01-18 17:38:34,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=390, Invalid=4032, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:38:34,236 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 151 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 2397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:34,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 631 Invalid, 2397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:38:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-18 17:38:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 403. [2022-01-18 17:38:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-01-18 17:38:34,244 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-01-18 17:38:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-01-18 17:38:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-01-18 17:38:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:34,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:34,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:34,273 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 17:38:34,468 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,SelfDestructingSolverStorable126 [2022-01-18 17:38:34,468 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash 474459917, now seen corresponding path program 115 times [2022-01-18 17:38:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301627402] [2022-01-18 17:38:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:34,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:34,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301627402] [2022-01-18 17:38:34,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301627402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:34,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207817715] [2022-01-18 17:38:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:38:34,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:34,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:34,780 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 17:38:34,782 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 17:38:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:35,023 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 17:38:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:35,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:35,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:35,811 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 24 treesize of output 26 [2022-01-18 17:38:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:35,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207817715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:35,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:35,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:38:35,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428843803] [2022-01-18 17:38:35,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:35,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:38:35,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:38:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:38:35,915 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:37,472 INFO L93 Difference]: Finished difference Result 888 states and 1730 transitions. [2022-01-18 17:38:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:38:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:37,474 INFO L225 Difference]: With dead ends: 888 [2022-01-18 17:38:37,474 INFO L226 Difference]: Without dead ends: 870 [2022-01-18 17:38:37,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=401, Invalid=4429, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:38:37,475 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 153 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:37,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 647 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2143 Invalid, 0 Unknown, 274 Unchecked, 0.8s Time] [2022-01-18 17:38:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-18 17:38:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 435. [2022-01-18 17:38:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.9907834101382489) internal successors, (864), 434 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 864 transitions. [2022-01-18 17:38:37,481 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 864 transitions. Word has length 30 [2022-01-18 17:38:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:37,481 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 864 transitions. [2022-01-18 17:38:37,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 864 transitions. [2022-01-18 17:38:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:37,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:37,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:37,497 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 17:38:37,683 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,SelfDestructingSolverStorable127 [2022-01-18 17:38:37,683 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1951485783, now seen corresponding path program 116 times [2022-01-18 17:38:37,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:37,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422733451] [2022-01-18 17:38:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:37,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:38,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:38,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422733451] [2022-01-18 17:38:38,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422733451] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:38,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393556861] [2022-01-18 17:38:38,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:38:38,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:38,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:38,004 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 17:38:38,005 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 17:38:38,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:38,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:38,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:38,250 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 17:38:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:38,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:39,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:39,023 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 24 treesize of output 26 [2022-01-18 17:38:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:39,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393556861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:39,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:38:39,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080843500] [2022-01-18 17:38:39,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:39,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:38:39,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:38:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1887, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:38:39,114 INFO L87 Difference]: Start difference. First operand 435 states and 864 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:40,877 INFO L93 Difference]: Finished difference Result 867 states and 1692 transitions. [2022-01-18 17:38:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 17:38:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 17:38:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:40,879 INFO L225 Difference]: With dead ends: 867 [2022-01-18 17:38:40,879 INFO L226 Difference]: Without dead ends: 844 [2022-01-18 17:38:40,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=428, Invalid=4828, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:38:40,880 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 139 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:40,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 655 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2229 Invalid, 0 Unknown, 126 Unchecked, 0.8s Time] [2022-01-18 17:38:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-18 17:38:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 400. [2022-01-18 17:38:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-01-18 17:38:40,886 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-01-18 17:38:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:40,886 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-01-18 17:38:40,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-01-18 17:38:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:40,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:40,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:40,903 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 17:38:41,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 17:38:41,088 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:41,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash -8943343, now seen corresponding path program 117 times [2022-01-18 17:38:41,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:41,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221701074] [2022-01-18 17:38:41,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:41,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:41,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:41,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221701074] [2022-01-18 17:38:41,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221701074] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:41,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166712007] [2022-01-18 17:38:41,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:41,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:41,413 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 17:38:41,418 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 17:38:41,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:38:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:41,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:41,696 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 17:38:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:41,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:42,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:42,561 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 29 [2022-01-18 17:38:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:42,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166712007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:42,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:42,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-01-18 17:38:42,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952670910] [2022-01-18 17:38:42,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:42,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 17:38:42,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 17:38:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2240, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:38:42,649 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:44,415 INFO L93 Difference]: Finished difference Result 854 states and 1668 transitions. [2022-01-18 17:38:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:44,416 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 17:38:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:44,417 INFO L225 Difference]: With dead ends: 854 [2022-01-18 17:38:44,417 INFO L226 Difference]: Without dead ends: 847 [2022-01-18 17:38:44,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=440, Invalid=5110, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:38:44,417 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 181 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:44,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 738 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:38:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-01-18 17:38:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 388. [2022-01-18 17:38:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.0103359173126614) internal successors, (778), 387 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:44,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 778 transitions. [2022-01-18 17:38:44,423 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 778 transitions. Word has length 30 [2022-01-18 17:38:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:44,423 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 778 transitions. [2022-01-18 17:38:44,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 778 transitions. [2022-01-18 17:38:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:44,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:44,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:44,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 17:38:44,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:44,627 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:44,628 INFO L85 PathProgramCache]: Analyzing trace with hash 962091669, now seen corresponding path program 118 times [2022-01-18 17:38:44,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:44,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593731902] [2022-01-18 17:38:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:44,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:44,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593731902] [2022-01-18 17:38:44,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593731902] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946837629] [2022-01-18 17:38:44,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:38:44,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:44,909 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 17:38:44,911 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 17:38:44,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:38:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:44,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:45,003 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 17:38:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:45,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:45,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:45,639 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 28 treesize of output 30 [2022-01-18 17:38:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:45,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946837629] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:45,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:45,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:38:45,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504795744] [2022-01-18 17:38:45,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:45,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:38:45,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:38:45,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:38:45,780 INFO L87 Difference]: Start difference. First operand 388 states and 778 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:47,135 INFO L93 Difference]: Finished difference Result 794 states and 1567 transitions. [2022-01-18 17:38:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:38:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:38:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:47,136 INFO L225 Difference]: With dead ends: 794 [2022-01-18 17:38:47,136 INFO L226 Difference]: Without dead ends: 785 [2022-01-18 17:38:47,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=3128, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:38:47,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:47,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 374 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:38:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-18 17:38:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 415. [2022-01-18 17:38:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.002415458937198) internal successors, (829), 414 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 829 transitions. [2022-01-18 17:38:47,141 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 829 transitions. Word has length 30 [2022-01-18 17:38:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:47,142 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 829 transitions. [2022-01-18 17:38:47,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 829 transitions. [2022-01-18 17:38:47,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:47,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:47,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:47,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-18 17:38:47,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:47,343 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1844157393, now seen corresponding path program 119 times [2022-01-18 17:38:47,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:47,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991941024] [2022-01-18 17:38:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:47,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:47,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991941024] [2022-01-18 17:38:47,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991941024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:47,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232921551] [2022-01-18 17:38:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:38:47,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:47,624 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 17:38:47,626 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 17:38:47,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:38:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:47,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:38:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:47,717 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 17:38:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:48,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:48,367 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 28 treesize of output 30 [2022-01-18 17:38:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:48,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232921551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:48,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:48,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:38:48,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008274766] [2022-01-18 17:38:48,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:48,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:38:48,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:38:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:38:48,505 INFO L87 Difference]: Start difference. First operand 415 states and 829 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:49,885 INFO L93 Difference]: Finished difference Result 679 states and 1351 transitions. [2022-01-18 17:38:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:38:49,885 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:38:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:49,886 INFO L225 Difference]: With dead ends: 679 [2022-01-18 17:38:49,886 INFO L226 Difference]: Without dead ends: 664 [2022-01-18 17:38:49,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 17:38:49,886 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 141 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:49,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 366 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:38:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-18 17:38:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 413. [2022-01-18 17:38:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0024271844660193) internal successors, (825), 412 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 825 transitions. [2022-01-18 17:38:49,891 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 825 transitions. Word has length 30 [2022-01-18 17:38:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:49,891 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 825 transitions. [2022-01-18 17:38:49,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 825 transitions. [2022-01-18 17:38:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:49,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:49,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:49,907 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 17:38:50,091 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,SelfDestructingSolverStorable131 [2022-01-18 17:38:50,092 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:50,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -982143185, now seen corresponding path program 120 times [2022-01-18 17:38:50,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:50,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891109645] [2022-01-18 17:38:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:50,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:50,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891109645] [2022-01-18 17:38:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891109645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:50,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611431420] [2022-01-18 17:38:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:38:50,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:50,369 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 17:38:50,370 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 17:38:50,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:38:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:38:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:50,461 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 17:38:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:50,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:51,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:51,071 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 28 treesize of output 30 [2022-01-18 17:38:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611431420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:51,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:51,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-01-18 17:38:51,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020657239] [2022-01-18 17:38:51,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:51,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:38:51,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:38:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:38:51,214 INFO L87 Difference]: Start difference. First operand 413 states and 825 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:52,511 INFO L93 Difference]: Finished difference Result 799 states and 1570 transitions. [2022-01-18 17:38:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:38:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:38:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:52,512 INFO L225 Difference]: With dead ends: 799 [2022-01-18 17:38:52,512 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 17:38:52,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=405, Invalid=2901, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:38:52,512 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:52,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 348 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:38:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 17:38:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 411. [2022-01-18 17:38:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.002439024390244) internal successors, (821), 410 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 821 transitions. [2022-01-18 17:38:52,517 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 821 transitions. Word has length 30 [2022-01-18 17:38:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:52,518 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 821 transitions. [2022-01-18 17:38:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 821 transitions. [2022-01-18 17:38:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:52,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:52,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:52,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-01-18 17:38:52,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:52,719 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash -60441045, now seen corresponding path program 121 times [2022-01-18 17:38:52,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:52,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902413695] [2022-01-18 17:38:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:52,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:53,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:53,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902413695] [2022-01-18 17:38:53,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902413695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:53,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589036019] [2022-01-18 17:38:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:38:53,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:53,033 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 17:38:53,033 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 17:38:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:53,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:53,127 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 17:38:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:53,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:53,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:53,771 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 28 treesize of output 30 [2022-01-18 17:38:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:53,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589036019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:53,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:53,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:38:53,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113218392] [2022-01-18 17:38:53,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:53,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:38:53,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:38:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:38:53,914 INFO L87 Difference]: Start difference. First operand 411 states and 821 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:55,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:55,218 INFO L93 Difference]: Finished difference Result 784 states and 1548 transitions. [2022-01-18 17:38:55,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:38:55,219 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:38:55,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:55,219 INFO L225 Difference]: With dead ends: 784 [2022-01-18 17:38:55,220 INFO L226 Difference]: Without dead ends: 741 [2022-01-18 17:38:55,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=3027, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:38:55,220 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:55,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 390 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:38:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-01-18 17:38:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 396. [2022-01-18 17:38:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-01-18 17:38:55,225 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-01-18 17:38:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:55,225 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-01-18 17:38:55,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-01-18 17:38:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:55,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:55,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:55,241 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 17:38:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:55,428 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash -874861461, now seen corresponding path program 122 times [2022-01-18 17:38:55,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216395845] [2022-01-18 17:38:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:55,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:55,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216395845] [2022-01-18 17:38:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216395845] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:55,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162198418] [2022-01-18 17:38:55,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:38:55,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:55,700 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 17:38:55,700 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 17:38:55,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:38:55,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:55,792 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 17:38:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:56,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:56,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:56,515 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 33 treesize of output 33 [2022-01-18 17:38:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:56,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162198418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:56,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:56,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-01-18 17:38:56,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988165599] [2022-01-18 17:38:56,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:56,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:38:56,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:56,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:38:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:38:56,658 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:38:58,230 INFO L93 Difference]: Finished difference Result 833 states and 1627 transitions. [2022-01-18 17:38:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:38:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:38:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:38:58,231 INFO L225 Difference]: With dead ends: 833 [2022-01-18 17:38:58,232 INFO L226 Difference]: Without dead ends: 824 [2022-01-18 17:38:58,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=476, Invalid=3556, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:38:58,232 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:38:58,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 426 Invalid, 2124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:38:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-18 17:38:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 413. [2022-01-18 17:38:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-01-18 17:38:58,237 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-01-18 17:38:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:38:58,238 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-01-18 17:38:58,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:38:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-01-18 17:38:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:38:58,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:38:58,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:38:58,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-18 17:38:58,438 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,SelfDestructingSolverStorable134 [2022-01-18 17:38:58,439 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:38:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:38:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash 7204263, now seen corresponding path program 123 times [2022-01-18 17:38:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:38:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876269026] [2022-01-18 17:38:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:38:58,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:38:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:38:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:58,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:38:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876269026] [2022-01-18 17:38:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876269026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:38:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775689958] [2022-01-18 17:38:58,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:38:58,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:38:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:38:58,740 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 17:38:58,740 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 17:38:58,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:38:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:38:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:38:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:38:58,831 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 17:38:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:38:59,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:38:59,569 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 33 treesize of output 33 [2022-01-18 17:38:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:38:59,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775689958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:38:59,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:38:59,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-01-18 17:38:59,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327160641] [2022-01-18 17:38:59,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:38:59,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:38:59,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:38:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:38:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:38:59,715 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:01,393 INFO L93 Difference]: Finished difference Result 717 states and 1409 transitions. [2022-01-18 17:39:01,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:39:01,393 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:39:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:01,394 INFO L225 Difference]: With dead ends: 717 [2022-01-18 17:39:01,394 INFO L226 Difference]: Without dead ends: 702 [2022-01-18 17:39:01,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=493, Invalid=3413, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:39:01,395 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 156 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:01,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 417 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-01-18 17:39:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 411. [2022-01-18 17:39:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-01-18 17:39:01,401 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-01-18 17:39:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:01,401 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-01-18 17:39:01,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-01-18 17:39:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:01,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:01,402 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:01,427 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 17:39:01,617 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,SelfDestructingSolverStorable135 [2022-01-18 17:39:01,617 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1475870981, now seen corresponding path program 124 times [2022-01-18 17:39:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711079579] [2022-01-18 17:39:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:01,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:01,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711079579] [2022-01-18 17:39:01,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711079579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:01,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516498684] [2022-01-18 17:39:01,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:39:01,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:01,929 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 17:39:01,930 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 17:39:01,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:39:01,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:01,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:02,023 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 17:39:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:02,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:02,637 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 28 treesize of output 30 [2022-01-18 17:39:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:02,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516498684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:02,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:02,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-01-18 17:39:02,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022817187] [2022-01-18 17:39:02,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:02,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:39:02,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:39:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:39:02,772 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:04,171 INFO L93 Difference]: Finished difference Result 819 states and 1603 transitions. [2022-01-18 17:39:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:39:04,171 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:04,172 INFO L225 Difference]: With dead ends: 819 [2022-01-18 17:39:04,172 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 17:39:04,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:39:04,172 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 166 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:04,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 387 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:39:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 17:39:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 409. [2022-01-18 17:39:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-01-18 17:39:04,178 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-01-18 17:39:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:04,178 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-01-18 17:39:04,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-01-18 17:39:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:04,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:04,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:04,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 17:39:04,378 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,SelfDestructingSolverStorable136 [2022-01-18 17:39:04,379 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1897394175, now seen corresponding path program 125 times [2022-01-18 17:39:04,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711657768] [2022-01-18 17:39:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:04,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:04,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711657768] [2022-01-18 17:39:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711657768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893002775] [2022-01-18 17:39:04,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:39:04,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:04,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:04,660 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 17:39:04,661 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 17:39:04,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:39:04,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:39:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:04,756 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 17:39:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:05,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:05,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:05,395 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 28 treesize of output 30 [2022-01-18 17:39:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:05,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893002775] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:05,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:05,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-01-18 17:39:05,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731756958] [2022-01-18 17:39:05,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:05,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:39:05,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:05,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:39:05,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:39:05,534 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:06,841 INFO L93 Difference]: Finished difference Result 798 states and 1571 transitions. [2022-01-18 17:39:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:39:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:39:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:06,842 INFO L225 Difference]: With dead ends: 798 [2022-01-18 17:39:06,842 INFO L226 Difference]: Without dead ends: 755 [2022-01-18 17:39:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 17:39:06,843 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:06,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 418 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:39:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-18 17:39:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-01-18 17:39:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-01-18 17:39:06,847 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-01-18 17:39:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-01-18 17:39:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-01-18 17:39:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:06,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:06,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:06,863 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 17:39:07,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:07,048 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:07,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1122547601, now seen corresponding path program 126 times [2022-01-18 17:39:07,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:07,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308436250] [2022-01-18 17:39:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:07,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:07,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308436250] [2022-01-18 17:39:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308436250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:07,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550889219] [2022-01-18 17:39:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:39:07,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:07,336 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 17:39:07,336 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 17:39:07,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:39:07,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:39:07,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:07,433 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 17:39:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:07,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:08,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:08,118 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 28 treesize of output 30 [2022-01-18 17:39:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:08,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550889219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:08,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:08,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:39:08,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208773668] [2022-01-18 17:39:08,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:08,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:08,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:08,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:08,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:08,262 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:10,202 INFO L93 Difference]: Finished difference Result 873 states and 1718 transitions. [2022-01-18 17:39:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:39:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:39:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:10,203 INFO L225 Difference]: With dead ends: 873 [2022-01-18 17:39:10,203 INFO L226 Difference]: Without dead ends: 864 [2022-01-18 17:39:10,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=518, Invalid=4038, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:39:10,203 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:10,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 426 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:39:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-18 17:39:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 411. [2022-01-18 17:39:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:10,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-01-18 17:39:10,208 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-01-18 17:39:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:10,209 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-01-18 17:39:10,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-01-18 17:39:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:10,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:10,209 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:10,224 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 17:39:10,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-01-18 17:39:10,410 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:10,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:10,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2004613325, now seen corresponding path program 127 times [2022-01-18 17:39:10,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:10,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499673017] [2022-01-18 17:39:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:10,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:10,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499673017] [2022-01-18 17:39:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499673017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:10,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845659190] [2022-01-18 17:39:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:39:10,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:10,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:10,692 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 17:39:10,692 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 17:39:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:10,783 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 17:39:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:11,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:11,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:11,470 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 28 treesize of output 30 [2022-01-18 17:39:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845659190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:11,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:11,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:39:11,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104800442] [2022-01-18 17:39:11,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:11,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:11,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:11,608 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:13,730 INFO L93 Difference]: Finished difference Result 730 states and 1445 transitions. [2022-01-18 17:39:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:39:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:39:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:13,732 INFO L225 Difference]: With dead ends: 730 [2022-01-18 17:39:13,732 INFO L226 Difference]: Without dead ends: 715 [2022-01-18 17:39:13,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:39:13,732 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:13,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 411 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:39:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-01-18 17:39:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 409. [2022-01-18 17:39:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-01-18 17:39:13,737 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-01-18 17:39:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:13,737 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-01-18 17:39:13,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-01-18 17:39:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:13,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:13,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:13,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-01-18 17:39:13,938 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,SelfDestructingSolverStorable139 [2022-01-18 17:39:13,938 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash -821687253, now seen corresponding path program 128 times [2022-01-18 17:39:13,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146712848] [2022-01-18 17:39:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:13,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:14,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146712848] [2022-01-18 17:39:14,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146712848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:14,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99949058] [2022-01-18 17:39:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:39:14,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:14,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:14,224 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 17:39:14,225 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 17:39:14,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:39:14,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:14,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:14,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:14,321 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 17:39:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:14,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:15,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:15,069 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 33 treesize of output 33 [2022-01-18 17:39:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:15,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99949058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:15,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:15,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-01-18 17:39:15,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918318074] [2022-01-18 17:39:15,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:15,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 17:39:15,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 17:39:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 17:39:15,213 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:17,405 INFO L93 Difference]: Finished difference Result 956 states and 1875 transitions. [2022-01-18 17:39:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:39:17,406 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:17,407 INFO L225 Difference]: With dead ends: 956 [2022-01-18 17:39:17,407 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 17:39:17,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 10 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2022-01-18 17:39:17,407 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 253 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:17,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 459 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:39:17,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 17:39:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-01-18 17:39:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-01-18 17:39:17,413 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-01-18 17:39:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:17,413 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-01-18 17:39:17,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-01-18 17:39:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:17,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:17,413 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:17,428 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 17:39:17,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:17,614 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash 66931137, now seen corresponding path program 129 times [2022-01-18 17:39:17,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:17,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669410662] [2022-01-18 17:39:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:17,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:17,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669410662] [2022-01-18 17:39:17,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669410662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984833848] [2022-01-18 17:39:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:39:17,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:17,913 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 17:39:17,914 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 17:39:17,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:39:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:18,009 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 17:39:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:18,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:18,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:18,685 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 28 treesize of output 30 [2022-01-18 17:39:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:18,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984833848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:18,825 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:18,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:39:18,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621372985] [2022-01-18 17:39:18,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:18,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:18,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:18,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:18,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:18,826 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:20,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:20,062 INFO L93 Difference]: Finished difference Result 798 states and 1566 transitions. [2022-01-18 17:39:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:39:20,062 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:20,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:20,063 INFO L225 Difference]: With dead ends: 798 [2022-01-18 17:39:20,063 INFO L226 Difference]: Without dead ends: 789 [2022-01-18 17:39:20,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=370, Invalid=3052, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:39:20,063 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:20,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 317 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:39:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-18 17:39:20,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 410. [2022-01-18 17:39:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:20,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-01-18 17:39:20,068 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-01-18 17:39:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:20,068 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-01-18 17:39:20,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-01-18 17:39:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:20,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:20,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:20,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-01-18 17:39:20,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:20,271 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash 948996861, now seen corresponding path program 130 times [2022-01-18 17:39:20,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:20,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459634226] [2022-01-18 17:39:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:20,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:20,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459634226] [2022-01-18 17:39:20,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459634226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:20,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477083021] [2022-01-18 17:39:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:39:20,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:20,572 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 17:39:20,572 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 17:39:20,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:39:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:20,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:20,665 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 17:39:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:21,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:21,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:21,386 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 28 treesize of output 30 [2022-01-18 17:39:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:21,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477083021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:21,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:39:21,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150594187] [2022-01-18 17:39:21,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:21,526 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:23,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:23,058 INFO L93 Difference]: Finished difference Result 681 states and 1339 transitions. [2022-01-18 17:39:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:39:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:23,059 INFO L225 Difference]: With dead ends: 681 [2022-01-18 17:39:23,059 INFO L226 Difference]: Without dead ends: 648 [2022-01-18 17:39:23,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=416, Invalid=3244, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:39:23,060 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:23,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 376 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1583 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-01-18 17:39:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-18 17:39:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-01-18 17:39:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-01-18 17:39:23,064 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-01-18 17:39:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-01-18 17:39:23,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-01-18 17:39:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:23,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:23,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:23,079 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 17:39:23,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:23,265 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 70989211, now seen corresponding path program 131 times [2022-01-18 17:39:23,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066638442] [2022-01-18 17:39:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:23,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:23,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066638442] [2022-01-18 17:39:23,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066638442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863800753] [2022-01-18 17:39:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:39:23,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:23,552 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 17:39:23,558 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 17:39:23,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:39:23,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:23,648 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 17:39:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:23,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:24,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:24,343 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 28 treesize of output 30 [2022-01-18 17:39:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863800753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:24,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:39:24,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966324609] [2022-01-18 17:39:24,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:24,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:39:24,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:39:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:39:24,487 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:25,739 INFO L93 Difference]: Finished difference Result 781 states and 1539 transitions. [2022-01-18 17:39:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:39:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:25,741 INFO L225 Difference]: With dead ends: 781 [2022-01-18 17:39:25,741 INFO L226 Difference]: Without dead ends: 748 [2022-01-18 17:39:25,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=380, Invalid=3160, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:39:25,741 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 153 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:25,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 366 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:39:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-18 17:39:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 395. [2022-01-18 17:39:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.0076142131979697) internal successors, (791), 394 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 791 transitions. [2022-01-18 17:39:25,746 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 791 transitions. Word has length 30 [2022-01-18 17:39:25,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:25,746 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 791 transitions. [2022-01-18 17:39:25,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 791 transitions. [2022-01-18 17:39:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:25,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:25,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:25,762 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 17:39:25,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:25,947 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -936370625, now seen corresponding path program 132 times [2022-01-18 17:39:25,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:25,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085318769] [2022-01-18 17:39:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:25,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:26,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085318769] [2022-01-18 17:39:26,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085318769] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:26,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869754961] [2022-01-18 17:39:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:39:26,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:26,262 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 17:39:26,262 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 17:39:26,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:39:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:39:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:26,417 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 17:39:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:26,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:27,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:27,102 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 28 treesize of output 30 [2022-01-18 17:39:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:27,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869754961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:27,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:27,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:27,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658580837] [2022-01-18 17:39:27,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:27,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:27,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:27,258 INFO L87 Difference]: Start difference. First operand 395 states and 791 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:28,736 INFO L93 Difference]: Finished difference Result 816 states and 1604 transitions. [2022-01-18 17:39:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:39:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:28,737 INFO L225 Difference]: With dead ends: 816 [2022-01-18 17:39:28,737 INFO L226 Difference]: Without dead ends: 807 [2022-01-18 17:39:28,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=453, Invalid=3969, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:39:28,738 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 129 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:28,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 416 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1847 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-18 17:39:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 413. [2022-01-18 17:39:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-01-18 17:39:28,743 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-01-18 17:39:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:28,743 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-01-18 17:39:28,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-01-18 17:39:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:28,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:28,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:28,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-01-18 17:39:28,943 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,SelfDestructingSolverStorable144 [2022-01-18 17:39:28,944 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -54304901, now seen corresponding path program 133 times [2022-01-18 17:39:28,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273438823] [2022-01-18 17:39:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:28,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:29,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273438823] [2022-01-18 17:39:29,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273438823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65744936] [2022-01-18 17:39:29,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:39:29,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:29,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:29,248 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 17:39:29,248 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 17:39:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:29,403 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 17:39:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:29,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:30,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:30,198 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 28 treesize of output 30 [2022-01-18 17:39:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65744936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:30,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:30,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430603305] [2022-01-18 17:39:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:30,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:30,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:30,349 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:32,007 INFO L93 Difference]: Finished difference Result 700 states and 1386 transitions. [2022-01-18 17:39:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:39:32,007 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:32,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:32,008 INFO L225 Difference]: With dead ends: 700 [2022-01-18 17:39:32,008 INFO L226 Difference]: Without dead ends: 685 [2022-01-18 17:39:32,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=482, Invalid=3940, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:39:32,009 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 157 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:32,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 395 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-01-18 17:39:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 411. [2022-01-18 17:39:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-01-18 17:39:32,013 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-01-18 17:39:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:32,013 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-01-18 17:39:32,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-01-18 17:39:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:32,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:32,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:32,031 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 17:39:32,214 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,SelfDestructingSolverStorable145 [2022-01-18 17:39:32,214 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1414361817, now seen corresponding path program 134 times [2022-01-18 17:39:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452280662] [2022-01-18 17:39:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:32,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:32,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452280662] [2022-01-18 17:39:32,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452280662] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:32,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399950382] [2022-01-18 17:39:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:39:32,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:32,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:32,528 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 17:39:32,529 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 17:39:32,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:39:32,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:32,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:32,680 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 17:39:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:33,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:33,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:33,431 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 33 treesize of output 33 [2022-01-18 17:39:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:33,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399950382] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:33,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:33,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 17:39:33,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387691242] [2022-01-18 17:39:33,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:33,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:39:33,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:33,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:39:33,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:39:33,598 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:35,246 INFO L93 Difference]: Finished difference Result 849 states and 1651 transitions. [2022-01-18 17:39:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:39:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:35,247 INFO L225 Difference]: With dead ends: 849 [2022-01-18 17:39:35,247 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 17:39:35,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=569, Invalid=4543, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:39:35,248 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 183 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:35,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 470 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 17:39:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 409. [2022-01-18 17:39:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:35,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-01-18 17:39:35,253 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-01-18 17:39:35,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:35,253 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-01-18 17:39:35,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-01-18 17:39:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:35,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:35,253 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:35,268 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 17:39:35,454 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,SelfDestructingSolverStorable146 [2022-01-18 17:39:35,454 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1958903339, now seen corresponding path program 135 times [2022-01-18 17:39:35,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:35,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724157309] [2022-01-18 17:39:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:35,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:35,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724157309] [2022-01-18 17:39:35,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724157309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700639298] [2022-01-18 17:39:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:39:35,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:35,756 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 17:39:35,756 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 17:39:35,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:39:35,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:35,909 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 17:39:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:36,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:36,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:36,705 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 33 treesize of output 33 [2022-01-18 17:39:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700639298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:36,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:39:36,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882548455] [2022-01-18 17:39:36,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:36,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:39:36,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:39:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:39:36,856 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:38,389 INFO L93 Difference]: Finished difference Result 828 states and 1619 transitions. [2022-01-18 17:39:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:39:38,389 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:38,390 INFO L225 Difference]: With dead ends: 828 [2022-01-18 17:39:38,390 INFO L226 Difference]: Without dead ends: 785 [2022-01-18 17:39:38,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=543, Invalid=4427, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:39:38,391 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 185 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:38,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 507 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-18 17:39:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 397. [2022-01-18 17:39:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-01-18 17:39:38,396 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-01-18 17:39:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:38,397 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-01-18 17:39:38,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-01-18 17:39:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:38,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:38,397 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:38,413 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 17:39:38,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:38,603 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1061038437, now seen corresponding path program 136 times [2022-01-18 17:39:38,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:38,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543056309] [2022-01-18 17:39:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:38,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:38,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543056309] [2022-01-18 17:39:38,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543056309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300022812] [2022-01-18 17:39:38,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:39:38,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:38,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:38,903 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 17:39:38,903 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 17:39:38,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:39:38,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:39,056 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 17:39:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:39,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:39,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:39,750 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 28 treesize of output 30 [2022-01-18 17:39:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:39,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300022812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:39,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:39,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:39,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114693444] [2022-01-18 17:39:39,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:39,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:39,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:39,900 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:41,732 INFO L93 Difference]: Finished difference Result 885 states and 1740 transitions. [2022-01-18 17:39:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:39:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:41,733 INFO L225 Difference]: With dead ends: 885 [2022-01-18 17:39:41,733 INFO L226 Difference]: Without dead ends: 876 [2022-01-18 17:39:41,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=557, Invalid=4699, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:39:41,734 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 209 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:41,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 382 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-01-18 17:39:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 411. [2022-01-18 17:39:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:41,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-01-18 17:39:41,739 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-01-18 17:39:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:41,739 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-01-18 17:39:41,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-01-18 17:39:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:41,740 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:41,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:41,755 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 17:39:41,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:41,940 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1943104161, now seen corresponding path program 137 times [2022-01-18 17:39:41,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:41,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373007975] [2022-01-18 17:39:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:41,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:42,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373007975] [2022-01-18 17:39:42,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373007975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882166574] [2022-01-18 17:39:42,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:39:42,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:42,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:42,250 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 17:39:42,251 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 17:39:42,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:39:42,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:42,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:39:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:42,409 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 17:39:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:42,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:43,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:43,191 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 28 treesize of output 30 [2022-01-18 17:39:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:43,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882166574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:43,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:43,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556928611] [2022-01-18 17:39:43,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:43,341 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:45,463 INFO L93 Difference]: Finished difference Result 739 states and 1461 transitions. [2022-01-18 17:39:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:39:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:45,465 INFO L225 Difference]: With dead ends: 739 [2022-01-18 17:39:45,465 INFO L226 Difference]: Without dead ends: 724 [2022-01-18 17:39:45,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:39:45,465 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 190 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:45,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 432 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:39:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-18 17:39:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 409. [2022-01-18 17:39:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-01-18 17:39:45,470 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-01-18 17:39:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:45,470 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-01-18 17:39:45,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-01-18 17:39:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:45,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:45,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:45,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-01-18 17:39:45,670 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,SelfDestructingSolverStorable149 [2022-01-18 17:39:45,671 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash -883196417, now seen corresponding path program 138 times [2022-01-18 17:39:45,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86737631] [2022-01-18 17:39:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:45,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:45,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86737631] [2022-01-18 17:39:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86737631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254012642] [2022-01-18 17:39:45,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:39:45,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:45,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:45,976 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 17:39:45,976 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 17:39:45,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:39:45,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:45,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:46,133 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 17:39:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:46,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:46,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:46,884 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 33 treesize of output 33 [2022-01-18 17:39:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:47,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254012642] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:47,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:47,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 17:39:47,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582851430] [2022-01-18 17:39:47,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:47,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:39:47,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:39:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:39:47,044 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:49,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:49,237 INFO L93 Difference]: Finished difference Result 956 states and 1877 transitions. [2022-01-18 17:39:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:39:49,238 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:49,239 INFO L225 Difference]: With dead ends: 956 [2022-01-18 17:39:49,239 INFO L226 Difference]: Without dead ends: 904 [2022-01-18 17:39:49,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=846, Invalid=5634, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 17:39:49,240 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 266 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:49,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 458 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:39:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-18 17:39:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 408. [2022-01-18 17:39:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9950859950859952) internal successors, (812), 407 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 812 transitions. [2022-01-18 17:39:49,245 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 812 transitions. Word has length 30 [2022-01-18 17:39:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 812 transitions. [2022-01-18 17:39:49,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 812 transitions. [2022-01-18 17:39:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:49,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:49,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:49,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 17:39:49,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:49,446 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:49,446 INFO L85 PathProgramCache]: Analyzing trace with hash 5421973, now seen corresponding path program 139 times [2022-01-18 17:39:49,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:49,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053794476] [2022-01-18 17:39:49,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:49,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:49,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053794476] [2022-01-18 17:39:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053794476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367099521] [2022-01-18 17:39:49,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:39:49,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:49,756 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 17:39:49,757 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 17:39:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:49,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:49,956 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 17:39:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:50,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:50,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:50,680 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 28 treesize of output 30 [2022-01-18 17:39:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:50,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367099521] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:50,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:50,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:50,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099867445] [2022-01-18 17:39:50,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:50,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:50,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:50,834 INFO L87 Difference]: Start difference. First operand 408 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:52,185 INFO L93 Difference]: Finished difference Result 796 states and 1563 transitions. [2022-01-18 17:39:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:39:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:39:52,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:52,186 INFO L225 Difference]: With dead ends: 796 [2022-01-18 17:39:52,186 INFO L226 Difference]: Without dead ends: 787 [2022-01-18 17:39:52,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=3620, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:39:52,187 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 127 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1744 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:52,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 438 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1744 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:39:52,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-18 17:39:52,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 410. [2022-01-18 17:39:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9926650366748166) internal successors, (815), 409 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 815 transitions. [2022-01-18 17:39:52,192 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 815 transitions. Word has length 30 [2022-01-18 17:39:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:52,192 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 815 transitions. [2022-01-18 17:39:52,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 815 transitions. [2022-01-18 17:39:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:52,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:52,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:52,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 17:39:52,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:52,393 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:52,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash 887487697, now seen corresponding path program 140 times [2022-01-18 17:39:52,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:52,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100387745] [2022-01-18 17:39:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:52,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:52,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100387745] [2022-01-18 17:39:52,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100387745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:52,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401433496] [2022-01-18 17:39:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:39:52,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:52,703 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 17:39:52,703 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 17:39:52,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:39:52,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:52,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:52,862 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 17:39:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:53,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:53,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:53,595 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 28 treesize of output 30 [2022-01-18 17:39:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:53,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401433496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:53,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:53,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:53,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137197334] [2022-01-18 17:39:53,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:53,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:53,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:53,758 INFO L87 Difference]: Start difference. First operand 410 states and 815 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:55,136 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-01-18 17:39:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:39:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:39:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:55,137 INFO L225 Difference]: With dead ends: 671 [2022-01-18 17:39:55,137 INFO L226 Difference]: Without dead ends: 648 [2022-01-18 17:39:55,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=436, Invalid=3596, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:39:55,137 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 160 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:55,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 303 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:39:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-18 17:39:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 400. [2022-01-18 17:39:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0050125313283207) internal successors, (800), 399 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 800 transitions. [2022-01-18 17:39:55,142 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 800 transitions. Word has length 30 [2022-01-18 17:39:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 800 transitions. [2022-01-18 17:39:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 800 transitions. [2022-01-18 17:39:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:55,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:55,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:55,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-01-18 17:39:55,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:55,343 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash 9480047, now seen corresponding path program 141 times [2022-01-18 17:39:55,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390029276] [2022-01-18 17:39:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:55,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:55,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:55,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390029276] [2022-01-18 17:39:55,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390029276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:55,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499914292] [2022-01-18 17:39:55,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:39:55,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:55,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:55,660 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 17:39:55,661 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 17:39:55,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:39:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:55,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:55,819 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 17:39:56,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:56,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:56,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:56,563 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 28 treesize of output 30 [2022-01-18 17:39:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499914292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:56,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:56,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:56,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847060616] [2022-01-18 17:39:56,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:56,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:56,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:56,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:56,721 INFO L87 Difference]: Start difference. First operand 400 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:58,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:39:58,111 INFO L93 Difference]: Finished difference Result 790 states and 1559 transitions. [2022-01-18 17:39:58,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:39:58,111 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:39:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:39:58,112 INFO L225 Difference]: With dead ends: 790 [2022-01-18 17:39:58,112 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 17:39:58,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=419, Invalid=3487, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:39:58,112 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:39:58,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 489 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:39:58,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 17:39:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 396. [2022-01-18 17:39:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.007594936708861) internal successors, (793), 395 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 793 transitions. [2022-01-18 17:39:58,117 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 793 transitions. Word has length 30 [2022-01-18 17:39:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:39:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 793 transitions. [2022-01-18 17:39:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:39:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 793 transitions. [2022-01-18 17:39:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:39:58,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:39:58,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:39:58,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-01-18 17:39:58,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:58,318 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:39:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:39:58,319 INFO L85 PathProgramCache]: Analyzing trace with hash -159765419, now seen corresponding path program 142 times [2022-01-18 17:39:58,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:39:58,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415471579] [2022-01-18 17:39:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:39:58,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:39:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:39:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:58,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:39:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415471579] [2022-01-18 17:39:58,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415471579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:39:58,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346119189] [2022-01-18 17:39:58,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:39:58,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:39:58,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:39:58,615 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 17:39:58,615 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 17:39:58,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:39:58,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:39:58,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:39:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:39:58,771 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 17:39:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:59,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:39:59,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:39:59,451 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 28 treesize of output 30 [2022-01-18 17:39:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:39:59,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346119189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:39:59,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:39:59,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:39:59,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543050216] [2022-01-18 17:39:59,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:39:59,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:39:59,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:39:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:39:59,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:39:59,605 INFO L87 Difference]: Start difference. First operand 396 states and 793 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:01,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:01,531 INFO L93 Difference]: Finished difference Result 841 states and 1655 transitions. [2022-01-18 17:40:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:40:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:01,532 INFO L225 Difference]: With dead ends: 841 [2022-01-18 17:40:01,532 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 17:40:01,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=623, Invalid=4927, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:40:01,532 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 204 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:01,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 396 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:40:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 17:40:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 411. [2022-01-18 17:40:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-01-18 17:40:01,538 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-01-18 17:40:01,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:01,538 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-01-18 17:40:01,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-01-18 17:40:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:01,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:01,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:01,553 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 17:40:01,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:01,739 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:01,739 INFO L85 PathProgramCache]: Analyzing trace with hash 722300305, now seen corresponding path program 143 times [2022-01-18 17:40:01,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:01,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831391289] [2022-01-18 17:40:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:01,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:02,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831391289] [2022-01-18 17:40:02,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831391289] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:02,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928417332] [2022-01-18 17:40:02,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:40:02,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:02,108 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 17:40:02,131 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 17:40:02,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:40:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:02,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:40:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:02,297 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 17:40:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:02,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:03,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:03,082 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 28 treesize of output 30 [2022-01-18 17:40:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:03,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928417332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:03,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:03,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:03,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997845378] [2022-01-18 17:40:03,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:03,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:03,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:03,236 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:05,375 INFO L93 Difference]: Finished difference Result 692 states and 1369 transitions. [2022-01-18 17:40:05,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:40:05,375 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:05,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:05,376 INFO L225 Difference]: With dead ends: 692 [2022-01-18 17:40:05,376 INFO L226 Difference]: Without dead ends: 677 [2022-01-18 17:40:05,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=635, Invalid=4767, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:40:05,376 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 185 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:05,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 413 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:40:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-18 17:40:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2022-01-18 17:40:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0122549019607843) internal successors, (821), 408 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 821 transitions. [2022-01-18 17:40:05,381 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 821 transitions. Word has length 30 [2022-01-18 17:40:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:05,381 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 821 transitions. [2022-01-18 17:40:05,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 821 transitions. [2022-01-18 17:40:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:05,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:05,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:05,397 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 17:40:05,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 17:40:05,582 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2104000273, now seen corresponding path program 144 times [2022-01-18 17:40:05,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:05,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196755692] [2022-01-18 17:40:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:05,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:05,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196755692] [2022-01-18 17:40:05,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196755692] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:05,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756447657] [2022-01-18 17:40:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:40:05,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:05,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:05,874 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 17:40:05,875 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 17:40:05,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:40:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:05,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:06,023 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 17:40:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:06,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:06,792 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 33 treesize of output 33 [2022-01-18 17:40:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:06,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756447657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:06,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:06,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 17:40:06,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270938606] [2022-01-18 17:40:06,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:06,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:40:06,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:40:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1721, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:40:06,952 INFO L87 Difference]: Start difference. First operand 409 states and 821 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:09,280 INFO L93 Difference]: Finished difference Result 934 states and 1827 transitions. [2022-01-18 17:40:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 17:40:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:09,281 INFO L225 Difference]: With dead ends: 934 [2022-01-18 17:40:09,281 INFO L226 Difference]: Without dead ends: 882 [2022-01-18 17:40:09,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=989, Invalid=6493, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 17:40:09,282 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 267 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:09,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 434 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:40:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-01-18 17:40:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 408. [2022-01-18 17:40:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.9975429975429975) internal successors, (813), 407 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:09,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 813 transitions. [2022-01-18 17:40:09,287 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 813 transitions. Word has length 30 [2022-01-18 17:40:09,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:09,287 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 813 transitions. [2022-01-18 17:40:09,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 813 transitions. [2022-01-18 17:40:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:09,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:09,288 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:09,303 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 17:40:09,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:09,488 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1215381883, now seen corresponding path program 145 times [2022-01-18 17:40:09,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:09,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991174896] [2022-01-18 17:40:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:09,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:09,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991174896] [2022-01-18 17:40:09,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991174896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396922942] [2022-01-18 17:40:09,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:40:09,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:09,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:09,789 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 17:40:09,789 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 17:40:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:09,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:09,941 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 17:40:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:10,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:10,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:10,714 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 28 treesize of output 30 [2022-01-18 17:40:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:10,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396922942] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:10,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:10,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:10,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261654710] [2022-01-18 17:40:10,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:10,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:10,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:10,867 INFO L87 Difference]: Start difference. First operand 408 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:12,503 INFO L93 Difference]: Finished difference Result 791 states and 1552 transitions. [2022-01-18 17:40:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:40:12,504 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:40:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:12,504 INFO L225 Difference]: With dead ends: 791 [2022-01-18 17:40:12,505 INFO L226 Difference]: Without dead ends: 782 [2022-01-18 17:40:12,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:40:12,505 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:12,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 450 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:40:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2022-01-18 17:40:12,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 410. [2022-01-18 17:40:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:12,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-01-18 17:40:12,510 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-01-18 17:40:12,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:12,510 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-01-18 17:40:12,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-01-18 17:40:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:12,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:12,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:12,526 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 17:40:12,711 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,SelfDestructingSolverStorable157 [2022-01-18 17:40:12,712 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash -333316159, now seen corresponding path program 146 times [2022-01-18 17:40:12,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125236874] [2022-01-18 17:40:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:12,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:13,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:13,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125236874] [2022-01-18 17:40:13,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125236874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:13,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968331715] [2022-01-18 17:40:13,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:40:13,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:13,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:13,013 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 17:40:13,013 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 17:40:13,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:13,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:13,167 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 17:40:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:13,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:13,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:13,984 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 28 treesize of output 30 [2022-01-18 17:40:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:14,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968331715] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:14,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:14,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:14,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24880832] [2022-01-18 17:40:14,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:14,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:14,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1614, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:14,140 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:15,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:15,870 INFO L93 Difference]: Finished difference Result 653 states and 1283 transitions. [2022-01-18 17:40:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:40:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:40:15,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:15,871 INFO L225 Difference]: With dead ends: 653 [2022-01-18 17:40:15,871 INFO L226 Difference]: Without dead ends: 620 [2022-01-18 17:40:15,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=550, Invalid=4420, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:40:15,872 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 179 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:15,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 356 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1474 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2022-01-18 17:40:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-01-18 17:40:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 400. [2022-01-18 17:40:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.007518796992481) internal successors, (801), 399 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 801 transitions. [2022-01-18 17:40:15,876 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 801 transitions. Word has length 30 [2022-01-18 17:40:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:15,876 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 801 transitions. [2022-01-18 17:40:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 801 transitions. [2022-01-18 17:40:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:15,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:15,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:15,891 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 17:40:16,077 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,SelfDestructingSolverStorable158 [2022-01-18 17:40:16,077 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1211323809, now seen corresponding path program 147 times [2022-01-18 17:40:16,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:16,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036155755] [2022-01-18 17:40:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:16,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:16,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:16,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036155755] [2022-01-18 17:40:16,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036155755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:16,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528450377] [2022-01-18 17:40:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:40:16,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:16,382 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 17:40:16,383 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 17:40:16,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:40:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:16,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:16,537 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 17:40:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:16,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:17,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:17,245 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 28 treesize of output 30 [2022-01-18 17:40:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:17,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528450377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:17,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137599061] [2022-01-18 17:40:17,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:17,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:17,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:17,404 INFO L87 Difference]: Start difference. First operand 400 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:19,007 INFO L93 Difference]: Finished difference Result 788 states and 1553 transitions. [2022-01-18 17:40:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:40:19,007 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:19,008 INFO L225 Difference]: With dead ends: 788 [2022-01-18 17:40:19,008 INFO L226 Difference]: Without dead ends: 755 [2022-01-18 17:40:19,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=502, Invalid=4054, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:40:19,008 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 473 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:40:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-01-18 17:40:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 397. [2022-01-18 17:40:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.01010101010101) internal successors, (796), 396 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 796 transitions. [2022-01-18 17:40:19,013 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 796 transitions. Word has length 30 [2022-01-18 17:40:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:19,013 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 796 transitions. [2022-01-18 17:40:19,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 796 transitions. [2022-01-18 17:40:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:19,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:19,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:19,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:19,214 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,SelfDestructingSolverStorable159 [2022-01-18 17:40:19,214 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash -725186305, now seen corresponding path program 148 times [2022-01-18 17:40:19,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:19,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483871881] [2022-01-18 17:40:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:19,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:19,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:19,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483871881] [2022-01-18 17:40:19,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483871881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:19,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393973894] [2022-01-18 17:40:19,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:40:19,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:19,546 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 17:40:19,546 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 17:40:19,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:40:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:19,699 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 17:40:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:20,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:20,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:20,399 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 28 treesize of output 30 [2022-01-18 17:40:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393973894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:20,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740960371] [2022-01-18 17:40:20,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:20,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:20,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:20,559 INFO L87 Difference]: Start difference. First operand 397 states and 796 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:21,935 INFO L93 Difference]: Finished difference Result 784 states and 1539 transitions. [2022-01-18 17:40:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:40:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:40:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:21,936 INFO L225 Difference]: With dead ends: 784 [2022-01-18 17:40:21,936 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 17:40:21,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=3741, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:40:21,936 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 156 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:21,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 442 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:40:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 17:40:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 411. [2022-01-18 17:40:21,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-01-18 17:40:21,941 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-01-18 17:40:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:21,942 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-01-18 17:40:21,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-01-18 17:40:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:21,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:21,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:21,958 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 17:40:22,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:22,143 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:22,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:22,143 INFO L85 PathProgramCache]: Analyzing trace with hash 156879419, now seen corresponding path program 149 times [2022-01-18 17:40:22,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:22,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944782424] [2022-01-18 17:40:22,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:22,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:22,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944782424] [2022-01-18 17:40:22,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944782424] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:22,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699040380] [2022-01-18 17:40:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:40:22,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:22,446 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 17:40:22,446 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 17:40:22,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:22,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:22,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:22,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:22,602 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 17:40:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:22,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:23,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:23,325 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 28 treesize of output 30 [2022-01-18 17:40:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:23,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699040380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:23,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:23,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:23,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132056594] [2022-01-18 17:40:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:23,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:23,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:23,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:23,486 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:24,979 INFO L93 Difference]: Finished difference Result 657 states and 1298 transitions. [2022-01-18 17:40:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:40:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:40:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:24,980 INFO L225 Difference]: With dead ends: 657 [2022-01-18 17:40:24,980 INFO L226 Difference]: Without dead ends: 642 [2022-01-18 17:40:24,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=3715, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:40:24,981 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 157 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:24,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 416 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1777 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:40:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-01-18 17:40:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 409. [2022-01-18 17:40:24,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0049019607843137) internal successors, (818), 408 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 818 transitions. [2022-01-18 17:40:24,985 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 818 transitions. Word has length 30 [2022-01-18 17:40:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:24,985 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 818 transitions. [2022-01-18 17:40:24,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 818 transitions. [2022-01-18 17:40:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:24,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:24,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:25,001 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 17:40:25,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:25,186 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:25,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:25,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1625546137, now seen corresponding path program 150 times [2022-01-18 17:40:25,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:25,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673668677] [2022-01-18 17:40:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:25,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:25,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:25,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673668677] [2022-01-18 17:40:25,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673668677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:25,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886305315] [2022-01-18 17:40:25,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:40:25,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:25,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:25,488 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 17:40:25,488 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 17:40:25,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:40:25,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:25,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:25,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:25,638 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 17:40:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:26,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:26,370 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:26,370 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 28 treesize of output 30 [2022-01-18 17:40:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:26,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886305315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:26,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:26,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:40:26,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761386530] [2022-01-18 17:40:26,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:26,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:40:26,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:40:26,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:40:26,523 INFO L87 Difference]: Start difference. First operand 409 states and 818 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:27,431 INFO L93 Difference]: Finished difference Result 642 states and 1267 transitions. [2022-01-18 17:40:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 17:40:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:27,432 INFO L225 Difference]: With dead ends: 642 [2022-01-18 17:40:27,432 INFO L226 Difference]: Without dead ends: 603 [2022-01-18 17:40:27,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=294, Invalid=2256, Unknown=0, NotChecked=0, Total=2550 [2022-01-18 17:40:27,433 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 107 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:27,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 594 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1521 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-01-18 17:40:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-18 17:40:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 401. [2022-01-18 17:40:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-01-18 17:40:27,437 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-01-18 17:40:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:27,437 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-01-18 17:40:27,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-01-18 17:40:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:27,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:27,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:27,453 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 17:40:27,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:27,638 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:27,638 INFO L85 PathProgramCache]: Analyzing trace with hash -721128231, now seen corresponding path program 151 times [2022-01-18 17:40:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:27,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104639833] [2022-01-18 17:40:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:27,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:27,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104639833] [2022-01-18 17:40:27,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104639833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:27,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512723915] [2022-01-18 17:40:27,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:40:27,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:27,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:27,934 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 17:40:27,935 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 17:40:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:28,091 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 17:40:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:28,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:28,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:28,810 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 28 treesize of output 30 [2022-01-18 17:40:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512723915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:28,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:28,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:28,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476879278] [2022-01-18 17:40:28,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:28,963 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:29,931 INFO L93 Difference]: Finished difference Result 766 states and 1510 transitions. [2022-01-18 17:40:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:40:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:29,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:29,932 INFO L225 Difference]: With dead ends: 766 [2022-01-18 17:40:29,932 INFO L226 Difference]: Without dead ends: 749 [2022-01-18 17:40:29,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:40:29,933 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:29,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 351 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 989 Invalid, 0 Unknown, 144 Unchecked, 0.4s Time] [2022-01-18 17:40:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-18 17:40:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 415. [2022-01-18 17:40:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 1.9855072463768115) internal successors, (822), 414 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 822 transitions. [2022-01-18 17:40:29,938 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 822 transitions. Word has length 30 [2022-01-18 17:40:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:29,938 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 822 transitions. [2022-01-18 17:40:29,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 822 transitions. [2022-01-18 17:40:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:29,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:29,938 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:29,954 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 17:40:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:30,139 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1147893365, now seen corresponding path program 152 times [2022-01-18 17:40:30,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139603702] [2022-01-18 17:40:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:30,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:30,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139603702] [2022-01-18 17:40:30,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139603702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141131848] [2022-01-18 17:40:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:40:30,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:30,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:30,432 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 17:40:30,433 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 17:40:30,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:30,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:30,588 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 17:40:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:31,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:31,302 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 28 treesize of output 30 [2022-01-18 17:40:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:31,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141131848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:31,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:31,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:31,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385866404] [2022-01-18 17:40:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:31,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:31,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:31,454 INFO L87 Difference]: Start difference. First operand 415 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:32,477 INFO L93 Difference]: Finished difference Result 754 states and 1486 transitions. [2022-01-18 17:40:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 17:40:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 17:40:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:32,478 INFO L225 Difference]: With dead ends: 754 [2022-01-18 17:40:32,478 INFO L226 Difference]: Without dead ends: 733 [2022-01-18 17:40:32,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:40:32,478 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 136 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:32,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 335 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 983 Invalid, 0 Unknown, 212 Unchecked, 0.4s Time] [2022-01-18 17:40:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-18 17:40:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 399. [2022-01-18 17:40:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0050251256281406) internal successors, (798), 398 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 798 transitions. [2022-01-18 17:40:32,483 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 798 transitions. Word has length 30 [2022-01-18 17:40:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:32,483 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 798 transitions. [2022-01-18 17:40:32,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 798 transitions. [2022-01-18 17:40:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:32,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:32,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:32,499 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 17:40:32,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:32,684 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1234330325, now seen corresponding path program 153 times [2022-01-18 17:40:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:32,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979596548] [2022-01-18 17:40:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:32,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:32,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979596548] [2022-01-18 17:40:32,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979596548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199684424] [2022-01-18 17:40:32,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:40:32,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:32,998 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 17:40:32,998 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 17:40:33,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:40:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:33,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:33,157 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 17:40:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:33,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:33,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:33,987 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 28 treesize of output 30 [2022-01-18 17:40:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199684424] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:34,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:34,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:40:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913483854] [2022-01-18 17:40:34,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:34,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:40:34,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:40:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:40:34,149 INFO L87 Difference]: Start difference. First operand 399 states and 798 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:35,357 INFO L93 Difference]: Finished difference Result 752 states and 1486 transitions. [2022-01-18 17:40:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:40:35,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:35,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:35,359 INFO L225 Difference]: With dead ends: 752 [2022-01-18 17:40:35,359 INFO L226 Difference]: Without dead ends: 716 [2022-01-18 17:40:35,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=425, Invalid=3865, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:40:35,359 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:35,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 514 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1394 Invalid, 0 Unknown, 309 Unchecked, 0.5s Time] [2022-01-18 17:40:35,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-18 17:40:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 394. [2022-01-18 17:40:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.0076335877862594) internal successors, (789), 393 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 789 transitions. [2022-01-18 17:40:35,364 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 789 transitions. Word has length 30 [2022-01-18 17:40:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:35,364 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 789 transitions. [2022-01-18 17:40:35,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 789 transitions. [2022-01-18 17:40:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:35,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:35,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:35,380 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 17:40:35,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:35,565 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1602804433, now seen corresponding path program 154 times [2022-01-18 17:40:35,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451464538] [2022-01-18 17:40:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:35,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:35,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451464538] [2022-01-18 17:40:35,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451464538] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734830590] [2022-01-18 17:40:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:40:35,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:35,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:35,868 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 17:40:35,869 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 17:40:35,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:40:35,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:36,050 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 17:40:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:36,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:36,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:36,788 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 28 treesize of output 30 [2022-01-18 17:40:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:36,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734830590] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:36,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:36,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:36,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037425759] [2022-01-18 17:40:36,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:36,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:36,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:36,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:36,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:36,941 INFO L87 Difference]: Start difference. First operand 394 states and 789 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:38,529 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2022-01-18 17:40:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:40:38,529 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:38,530 INFO L225 Difference]: With dead ends: 811 [2022-01-18 17:40:38,530 INFO L226 Difference]: Without dead ends: 802 [2022-01-18 17:40:38,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:40:38,531 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 143 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:38,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 489 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:40:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-18 17:40:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 415. [2022-01-18 17:40:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2022-01-18 17:40:38,536 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2022-01-18 17:40:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:38,536 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2022-01-18 17:40:38,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2022-01-18 17:40:38,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:38,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:38,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:38,552 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 17:40:38,737 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,SelfDestructingSolverStorable166 [2022-01-18 17:40:38,737 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -720738709, now seen corresponding path program 155 times [2022-01-18 17:40:38,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:38,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957759681] [2022-01-18 17:40:38,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:38,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:39,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957759681] [2022-01-18 17:40:39,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957759681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:39,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287332234] [2022-01-18 17:40:39,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:40:39,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:39,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:39,041 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 17:40:39,041 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 17:40:39,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:40:39,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:40:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:39,220 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 17:40:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:39,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:39,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:39,994 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 28 treesize of output 30 [2022-01-18 17:40:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:40,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287332234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:40,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:40,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:40,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888804525] [2022-01-18 17:40:40,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:40,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:40,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:40,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:40,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:40,143 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:41,777 INFO L93 Difference]: Finished difference Result 695 states and 1378 transitions. [2022-01-18 17:40:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:40:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:41,778 INFO L225 Difference]: With dead ends: 695 [2022-01-18 17:40:41,778 INFO L226 Difference]: Without dead ends: 680 [2022-01-18 17:40:41,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=481, Invalid=4075, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:40:41,778 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 149 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:41,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 386 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:40:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-18 17:40:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 413. [2022-01-18 17:40:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-01-18 17:40:41,783 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-01-18 17:40:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:41,784 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-01-18 17:40:41,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-01-18 17:40:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:41,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:41,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:41,824 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 17:40:41,991 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,SelfDestructingSolverStorable167 [2022-01-18 17:40:41,991 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 747928009, now seen corresponding path program 156 times [2022-01-18 17:40:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006787374] [2022-01-18 17:40:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:41,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:42,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:42,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006787374] [2022-01-18 17:40:42,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006787374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:42,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286376765] [2022-01-18 17:40:42,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:40:42,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:42,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:42,291 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 17:40:42,291 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 17:40:42,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:40:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:40:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:42,469 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 17:40:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:42,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:43,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:43,096 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 28 treesize of output 30 [2022-01-18 17:40:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:43,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286376765] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:43,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:43,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:40:43,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693967426] [2022-01-18 17:40:43,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:43,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:40:43,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:40:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:40:43,248 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:44,773 INFO L93 Difference]: Finished difference Result 825 states and 1617 transitions. [2022-01-18 17:40:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:40:44,773 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:44,774 INFO L225 Difference]: With dead ends: 825 [2022-01-18 17:40:44,774 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 17:40:44,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=3959, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:40:44,775 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 170 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:44,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 464 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:40:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 17:40:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 411. [2022-01-18 17:40:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-01-18 17:40:44,780 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-01-18 17:40:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:44,780 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-01-18 17:40:44,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-01-18 17:40:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:44,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:44,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:44,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:44,981 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,SelfDestructingSolverStorable168 [2022-01-18 17:40:44,981 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:44,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:44,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1669630149, now seen corresponding path program 157 times [2022-01-18 17:40:44,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:44,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719093784] [2022-01-18 17:40:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:44,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:45,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:45,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719093784] [2022-01-18 17:40:45,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719093784] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408969632] [2022-01-18 17:40:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:40:45,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:45,287 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 17:40:45,287 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 17:40:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:45,467 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 17:40:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:46,117 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:46,117 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 28 treesize of output 30 [2022-01-18 17:40:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:46,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408969632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:46,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:46,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:40:46,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407739874] [2022-01-18 17:40:46,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:46,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:40:46,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:40:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:40:46,273 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:47,653 INFO L93 Difference]: Finished difference Result 804 states and 1585 transitions. [2022-01-18 17:40:47,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:40:47,653 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:47,654 INFO L225 Difference]: With dead ends: 804 [2022-01-18 17:40:47,654 INFO L226 Difference]: Without dead ends: 761 [2022-01-18 17:40:47,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=442, Invalid=3848, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:40:47,655 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:47,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 451 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:40:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-18 17:40:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 399. [2022-01-18 17:40:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.007537688442211) internal successors, (799), 398 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 799 transitions. [2022-01-18 17:40:47,660 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 799 transitions. Word has length 30 [2022-01-18 17:40:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:47,660 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 799 transitions. [2022-01-18 17:40:47,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 799 transitions. [2022-01-18 17:40:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:47,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:47,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:47,675 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 17:40:47,861 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,SelfDestructingSolverStorable169 [2022-01-18 17:40:47,861 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:47,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:47,861 INFO L85 PathProgramCache]: Analyzing trace with hash 394604629, now seen corresponding path program 158 times [2022-01-18 17:40:47,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:47,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845727191] [2022-01-18 17:40:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:47,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:48,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845727191] [2022-01-18 17:40:48,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845727191] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186661419] [2022-01-18 17:40:48,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:40:48,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:48,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:48,171 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 17:40:48,172 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 17:40:48,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:48,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:48,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:48,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:48,354 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 17:40:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:48,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:49,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:49,144 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 33 treesize of output 33 [2022-01-18 17:40:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:49,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186661419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:49,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:49,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:40:49,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515881934] [2022-01-18 17:40:49,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:49,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:40:49,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:49,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:40:49,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:40:49,307 INFO L87 Difference]: Start difference. First operand 399 states and 799 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:51,665 INFO L93 Difference]: Finished difference Result 969 states and 1901 transitions. [2022-01-18 17:40:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 17:40:51,665 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:51,666 INFO L225 Difference]: With dead ends: 969 [2022-01-18 17:40:51,666 INFO L226 Difference]: Without dead ends: 960 [2022-01-18 17:40:51,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=882, Invalid=6600, Unknown=0, NotChecked=0, Total=7482 [2022-01-18 17:40:51,667 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 223 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 2632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:51,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 472 Invalid, 2632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:40:51,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-18 17:40:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 413. [2022-01-18 17:40:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0097087378640777) internal successors, (828), 412 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 828 transitions. [2022-01-18 17:40:51,672 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 828 transitions. Word has length 30 [2022-01-18 17:40:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:51,672 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 828 transitions. [2022-01-18 17:40:51,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 828 transitions. [2022-01-18 17:40:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:51,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:51,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:51,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 17:40:51,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:51,873 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1276670353, now seen corresponding path program 159 times [2022-01-18 17:40:51,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:51,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351495018] [2022-01-18 17:40:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:51,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:52,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351495018] [2022-01-18 17:40:52,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351495018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:52,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706969323] [2022-01-18 17:40:52,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:40:52,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:52,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:52,209 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 17:40:52,210 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 17:40:52,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:40:52,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:52,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:52,391 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 17:40:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:52,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:53,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:53,211 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 33 treesize of output 33 [2022-01-18 17:40:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:53,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706969323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:53,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:53,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:40:53,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466007764] [2022-01-18 17:40:53,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:53,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:40:53,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:40:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:40:53,371 INFO L87 Difference]: Start difference. First operand 413 states and 828 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:55,899 INFO L93 Difference]: Finished difference Result 869 states and 1715 transitions. [2022-01-18 17:40:55,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 17:40:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:55,900 INFO L225 Difference]: With dead ends: 869 [2022-01-18 17:40:55,900 INFO L226 Difference]: Without dead ends: 854 [2022-01-18 17:40:55,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=916, Invalid=6394, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 17:40:55,901 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 263 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:55,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 409 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:40:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-01-18 17:40:55,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 411. [2022-01-18 17:40:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0097560975609756) internal successors, (824), 410 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 824 transitions. [2022-01-18 17:40:55,912 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 824 transitions. Word has length 30 [2022-01-18 17:40:55,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:55,912 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 824 transitions. [2022-01-18 17:40:55,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:55,912 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 824 transitions. [2022-01-18 17:40:55,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:55,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:55,912 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:55,929 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 17:40:56,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:56,113 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1549630225, now seen corresponding path program 160 times [2022-01-18 17:40:56,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793667798] [2022-01-18 17:40:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:56,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:56,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793667798] [2022-01-18 17:40:56,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793667798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:56,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060485683] [2022-01-18 17:40:56,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:40:56,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:56,411 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 17:40:56,412 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 17:40:56,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:40:56,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:40:56,589 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 17:40:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:56,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:40:57,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:40:57,334 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 28 treesize of output 30 [2022-01-18 17:40:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:57,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060485683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:40:57,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:40:57,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:40:57,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975175335] [2022-01-18 17:40:57,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:40:57,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:40:57,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:40:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:40:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:40:57,486 INFO L87 Difference]: Start difference. First operand 411 states and 824 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:59,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:40:59,439 INFO L93 Difference]: Finished difference Result 892 states and 1752 transitions. [2022-01-18 17:40:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-18 17:40:59,439 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:40:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:40:59,440 INFO L225 Difference]: With dead ends: 892 [2022-01-18 17:40:59,440 INFO L226 Difference]: Without dead ends: 831 [2022-01-18 17:40:59,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=590, Invalid=4812, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:40:59,440 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 203 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:40:59,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 446 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1808 Invalid, 0 Unknown, 138 Unchecked, 0.7s Time] [2022-01-18 17:40:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-01-18 17:40:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 410. [2022-01-18 17:40:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9951100244498778) internal successors, (816), 409 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 816 transitions. [2022-01-18 17:40:59,447 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 816 transitions. Word has length 30 [2022-01-18 17:40:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:40:59,448 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 816 transitions. [2022-01-18 17:40:59,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:40:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 816 transitions. [2022-01-18 17:40:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:40:59,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:40:59,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:40:59,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 17:40:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:59,649 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:40:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:40:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash -661011835, now seen corresponding path program 161 times [2022-01-18 17:40:59,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:40:59,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104751893] [2022-01-18 17:40:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:40:59,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:40:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:40:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:40:59,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:40:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104751893] [2022-01-18 17:40:59,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104751893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:40:59,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984893407] [2022-01-18 17:40:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:40:59,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:40:59,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:40:59,953 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 17:40:59,954 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 17:40:59,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:40:59,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:40:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:40:59,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:00,137 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 17:41:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:00,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:00,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:00,826 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 28 treesize of output 30 [2022-01-18 17:41:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:00,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984893407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:00,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:00,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:00,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643245376] [2022-01-18 17:41:00,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:00,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:00,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:00,979 INFO L87 Difference]: Start difference. First operand 410 states and 816 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:02,198 INFO L93 Difference]: Finished difference Result 799 states and 1569 transitions. [2022-01-18 17:41:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:41:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:02,199 INFO L225 Difference]: With dead ends: 799 [2022-01-18 17:41:02,199 INFO L226 Difference]: Without dead ends: 790 [2022-01-18 17:41:02,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=397, Invalid=3635, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:41:02,199 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 131 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:02,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 368 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:41:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-01-18 17:41:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 412. [2022-01-18 17:41:02,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9927007299270072) internal successors, (819), 411 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 819 transitions. [2022-01-18 17:41:02,204 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 819 transitions. Word has length 30 [2022-01-18 17:41:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:02,204 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 819 transitions. [2022-01-18 17:41:02,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:02,205 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 819 transitions. [2022-01-18 17:41:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:02,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:02,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:02,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:02,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:02,407 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:02,408 INFO L85 PathProgramCache]: Analyzing trace with hash 221053889, now seen corresponding path program 162 times [2022-01-18 17:41:02,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:02,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399157251] [2022-01-18 17:41:02,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:02,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:02,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399157251] [2022-01-18 17:41:02,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399157251] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295042070] [2022-01-18 17:41:02,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:41:02,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:02,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:02,718 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 17:41:02,718 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 17:41:02,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:41:02,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:02,902 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 17:41:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:03,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:03,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:03,692 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 28 treesize of output 30 [2022-01-18 17:41:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295042070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:03,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442621044] [2022-01-18 17:41:03,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:03,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:03,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:03,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:03,857 INFO L87 Difference]: Start difference. First operand 412 states and 819 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:05,269 INFO L93 Difference]: Finished difference Result 671 states and 1327 transitions. [2022-01-18 17:41:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:41:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:05,271 INFO L225 Difference]: With dead ends: 671 [2022-01-18 17:41:05,271 INFO L226 Difference]: Without dead ends: 648 [2022-01-18 17:41:05,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=421, Invalid=3611, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 17:41:05,271 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 146 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:05,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 389 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-18 17:41:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 402. [2022-01-18 17:41:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0049875311720697) internal successors, (804), 401 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 804 transitions. [2022-01-18 17:41:05,277 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 804 transitions. Word has length 30 [2022-01-18 17:41:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:05,277 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 804 transitions. [2022-01-18 17:41:05,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:05,277 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 804 transitions. [2022-01-18 17:41:05,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:05,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:05,278 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:05,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:05,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:05,491 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash -656953761, now seen corresponding path program 163 times [2022-01-18 17:41:05,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:05,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770863322] [2022-01-18 17:41:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:05,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:05,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770863322] [2022-01-18 17:41:05,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770863322] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451443454] [2022-01-18 17:41:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:41:05,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:05,796 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 17:41:05,796 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 17:41:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:05,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:05,978 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 17:41:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:06,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:06,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:06,690 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 28 treesize of output 30 [2022-01-18 17:41:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:06,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451443454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:06,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:06,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:06,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890137164] [2022-01-18 17:41:06,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:06,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:06,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:06,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:06,842 INFO L87 Difference]: Start difference. First operand 402 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:07,974 INFO L93 Difference]: Finished difference Result 793 states and 1565 transitions. [2022-01-18 17:41:07,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:41:07,974 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:07,975 INFO L225 Difference]: With dead ends: 793 [2022-01-18 17:41:07,975 INFO L226 Difference]: Without dead ends: 776 [2022-01-18 17:41:07,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=3387, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:41:07,975 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:07,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 388 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1237 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-01-18 17:41:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-18 17:41:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 416. [2022-01-18 17:41:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9855421686746988) internal successors, (824), 415 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 824 transitions. [2022-01-18 17:41:07,980 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 824 transitions. Word has length 30 [2022-01-18 17:41:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:07,980 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 824 transitions. [2022-01-18 17:41:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 824 transitions. [2022-01-18 17:41:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:07,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:07,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:07,996 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 17:41:08,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:08,181 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1212067835, now seen corresponding path program 164 times [2022-01-18 17:41:08,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:08,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682943260] [2022-01-18 17:41:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:08,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:08,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682943260] [2022-01-18 17:41:08,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682943260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88999928] [2022-01-18 17:41:08,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:41:08,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:08,511 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 17:41:08,511 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 17:41:08,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:41:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:08,699 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 17:41:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:09,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:09,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:09,408 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 28 treesize of output 30 [2022-01-18 17:41:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:09,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88999928] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:09,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:09,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:09,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737143811] [2022-01-18 17:41:09,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:09,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:09,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:09,572 INFO L87 Difference]: Start difference. First operand 416 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:10,712 INFO L93 Difference]: Finished difference Result 739 states and 1454 transitions. [2022-01-18 17:41:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:41:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 17:41:10,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:10,714 INFO L225 Difference]: With dead ends: 739 [2022-01-18 17:41:10,714 INFO L226 Difference]: Without dead ends: 718 [2022-01-18 17:41:10,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=359, Invalid=3181, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:41:10,714 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 100 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:10,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 531 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1500 Invalid, 0 Unknown, 119 Unchecked, 0.6s Time] [2022-01-18 17:41:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-01-18 17:41:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 398. [2022-01-18 17:41:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0075566750629723) internal successors, (797), 397 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 797 transitions. [2022-01-18 17:41:10,719 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 797 transitions. Word has length 30 [2022-01-18 17:41:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:10,719 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 797 transitions. [2022-01-18 17:41:10,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 797 transitions. [2022-01-18 17:41:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:10,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:10,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:10,734 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 17:41:10,920 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,SelfDestructingSolverStorable176 [2022-01-18 17:41:10,920 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -826199227, now seen corresponding path program 165 times [2022-01-18 17:41:10,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126667208] [2022-01-18 17:41:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:10,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:11,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126667208] [2022-01-18 17:41:11,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126667208] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24029737] [2022-01-18 17:41:11,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:41:11,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:11,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:11,216 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 17:41:11,217 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 17:41:11,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:41:11,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:11,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:11,400 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 17:41:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:11,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:12,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:12,192 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 33 treesize of output 33 [2022-01-18 17:41:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:12,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24029737] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:12,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:12,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-01-18 17:41:12,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860192826] [2022-01-18 17:41:12,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:12,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-18 17:41:12,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-18 17:41:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 17:41:12,354 INFO L87 Difference]: Start difference. First operand 398 states and 797 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:14,684 INFO L93 Difference]: Finished difference Result 925 states and 1817 transitions. [2022-01-18 17:41:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 17:41:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:14,685 INFO L225 Difference]: With dead ends: 925 [2022-01-18 17:41:14,685 INFO L226 Difference]: Without dead ends: 916 [2022-01-18 17:41:14,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=988, Invalid=7022, Unknown=0, NotChecked=0, Total=8010 [2022-01-18 17:41:14,686 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 271 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:14,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 419 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:41:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-18 17:41:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 413. [2022-01-18 17:41:14,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:14,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-01-18 17:41:14,691 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-01-18 17:41:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:14,691 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-01-18 17:41:14,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-01-18 17:41:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:14,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:14,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:14,707 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 17:41:14,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 17:41:14,892 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 55866497, now seen corresponding path program 166 times [2022-01-18 17:41:14,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434894056] [2022-01-18 17:41:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:14,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:15,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434894056] [2022-01-18 17:41:15,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434894056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252884119] [2022-01-18 17:41:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:41:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:15,188 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 17:41:15,188 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 17:41:15,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:41:15,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:15,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:15,366 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 17:41:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:15,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:16,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:16,128 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 28 treesize of output 30 [2022-01-18 17:41:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:16,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252884119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:16,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:16,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:16,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092864253] [2022-01-18 17:41:16,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:16,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:16,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:16,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:16,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:16,279 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:18,537 INFO L93 Difference]: Finished difference Result 706 states and 1397 transitions. [2022-01-18 17:41:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:41:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:18,538 INFO L225 Difference]: With dead ends: 706 [2022-01-18 17:41:18,538 INFO L226 Difference]: Without dead ends: 691 [2022-01-18 17:41:18,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=654, Invalid=5046, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:41:18,538 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 208 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 2201 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:18,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 413 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:41:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-18 17:41:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 411. [2022-01-18 17:41:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0121951219512195) internal successors, (825), 410 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 825 transitions. [2022-01-18 17:41:18,544 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 825 transitions. Word has length 30 [2022-01-18 17:41:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:18,545 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 825 transitions. [2022-01-18 17:41:18,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 825 transitions. [2022-01-18 17:41:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:18,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:18,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:18,565 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 17:41:18,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 17:41:18,763 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1524533215, now seen corresponding path program 167 times [2022-01-18 17:41:18,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:18,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715561054] [2022-01-18 17:41:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:18,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:19,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:19,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715561054] [2022-01-18 17:41:19,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715561054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:19,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822558847] [2022-01-18 17:41:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:41:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:19,059 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 17:41:19,060 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 17:41:19,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:41:19,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:19,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:19,273 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 17:41:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:19,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:20,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:20,017 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 33 treesize of output 33 [2022-01-18 17:41:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822558847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:20,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 17:41:20,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953352571] [2022-01-18 17:41:20,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:41:20,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:41:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:41:20,168 INFO L87 Difference]: Start difference. First operand 411 states and 825 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:22,533 INFO L93 Difference]: Finished difference Result 945 states and 1850 transitions. [2022-01-18 17:41:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-18 17:41:22,534 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:22,534 INFO L225 Difference]: With dead ends: 945 [2022-01-18 17:41:22,534 INFO L226 Difference]: Without dead ends: 893 [2022-01-18 17:41:22,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1018, Invalid=6814, Unknown=0, NotChecked=0, Total=7832 [2022-01-18 17:41:22,535 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 288 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:22,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 458 Invalid, 2468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:41:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-18 17:41:22,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 410. [2022-01-18 17:41:22,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.9975550122249388) internal successors, (817), 409 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 817 transitions. [2022-01-18 17:41:22,540 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 817 transitions. Word has length 30 [2022-01-18 17:41:22,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:22,540 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 817 transitions. [2022-01-18 17:41:22,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 817 transitions. [2022-01-18 17:41:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:22,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:22,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:22,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-18 17:41:22,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:22,741 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1881815691, now seen corresponding path program 168 times [2022-01-18 17:41:22,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:22,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77624077] [2022-01-18 17:41:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:22,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:23,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77624077] [2022-01-18 17:41:23,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77624077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:23,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746868968] [2022-01-18 17:41:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:41:23,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:23,046 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 17:41:23,046 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 17:41:23,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:41:23,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:23,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:23,225 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 17:41:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:23,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:23,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:23,966 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 28 treesize of output 30 [2022-01-18 17:41:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:24,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746868968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:24,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:24,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:24,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156850249] [2022-01-18 17:41:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:24,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:24,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:24,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:24,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:24,118 INFO L87 Difference]: Start difference. First operand 410 states and 817 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:25,550 INFO L93 Difference]: Finished difference Result 798 states and 1567 transitions. [2022-01-18 17:41:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:41:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:25,551 INFO L225 Difference]: With dead ends: 798 [2022-01-18 17:41:25,552 INFO L226 Difference]: Without dead ends: 789 [2022-01-18 17:41:25,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=484, Invalid=4208, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:41:25,552 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 190 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:25,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 291 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:41:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-18 17:41:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 412. [2022-01-18 17:41:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.9951338199513382) internal successors, (820), 411 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 820 transitions. [2022-01-18 17:41:25,557 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 820 transitions. Word has length 30 [2022-01-18 17:41:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:25,558 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 820 transitions. [2022-01-18 17:41:25,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 820 transitions. [2022-01-18 17:41:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:25,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:25,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:25,573 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 17:41:25,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:25,759 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash -999749967, now seen corresponding path program 169 times [2022-01-18 17:41:25,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:25,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055427473] [2022-01-18 17:41:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:25,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:26,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055427473] [2022-01-18 17:41:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055427473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:26,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548725973] [2022-01-18 17:41:26,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:41:26,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:26,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:26,066 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 17:41:26,066 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 17:41:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:26,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:26,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:26,248 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 17:41:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:26,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:26,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:26,964 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 28 treesize of output 30 [2022-01-18 17:41:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:27,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548725973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:27,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:27,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:27,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159342495] [2022-01-18 17:41:27,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:27,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:27,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:27,120 INFO L87 Difference]: Start difference. First operand 412 states and 820 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:28,740 INFO L93 Difference]: Finished difference Result 653 states and 1290 transitions. [2022-01-18 17:41:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:41:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:28,741 INFO L225 Difference]: With dead ends: 653 [2022-01-18 17:41:28,741 INFO L226 Difference]: Without dead ends: 630 [2022-01-18 17:41:28,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=516, Invalid=4176, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:41:28,742 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 185 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:28,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 323 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-18 17:41:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 402. [2022-01-18 17:41:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.0074812967581046) internal successors, (805), 401 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 805 transitions. [2022-01-18 17:41:28,746 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 805 transitions. Word has length 30 [2022-01-18 17:41:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:28,746 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 805 transitions. [2022-01-18 17:41:28,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:28,746 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 805 transitions. [2022-01-18 17:41:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:28,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:28,746 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:28,761 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 17:41:28,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:28,947 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1877757617, now seen corresponding path program 170 times [2022-01-18 17:41:28,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524931060] [2022-01-18 17:41:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:28,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:29,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524931060] [2022-01-18 17:41:29,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524931060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:29,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39997648] [2022-01-18 17:41:29,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:41:29,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:29,238 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 17:41:29,240 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 17:41:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:41:29,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:29,417 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 17:41:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:29,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:30,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:30,106 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 28 treesize of output 30 [2022-01-18 17:41:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:30,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39997648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:30,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:30,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:30,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564147210] [2022-01-18 17:41:30,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:30,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:30,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:30,263 INFO L87 Difference]: Start difference. First operand 402 states and 805 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:31,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:31,745 INFO L93 Difference]: Finished difference Result 795 states and 1568 transitions. [2022-01-18 17:41:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:41:31,746 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:31,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:31,746 INFO L225 Difference]: With dead ends: 795 [2022-01-18 17:41:31,746 INFO L226 Difference]: Without dead ends: 762 [2022-01-18 17:41:31,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=487, Invalid=4069, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:41:31,747 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 163 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:31,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 418 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-01-18 17:41:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 399. [2022-01-18 17:41:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.0100502512562812) internal successors, (800), 398 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 800 transitions. [2022-01-18 17:41:31,752 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 800 transitions. Word has length 30 [2022-01-18 17:41:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:31,752 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 800 transitions. [2022-01-18 17:41:31,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 800 transitions. [2022-01-18 17:41:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:31,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:31,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:31,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:31,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:31,962 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:31,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1391620113, now seen corresponding path program 171 times [2022-01-18 17:41:31,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:31,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061028054] [2022-01-18 17:41:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:31,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:32,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061028054] [2022-01-18 17:41:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061028054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940851668] [2022-01-18 17:41:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:41:32,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:32,272 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 17:41:32,273 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 17:41:32,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:41:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:32,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:32,457 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 17:41:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:32,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:33,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:33,204 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 28 treesize of output 30 [2022-01-18 17:41:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:33,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940851668] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:33,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:33,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:33,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385657177] [2022-01-18 17:41:33,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:33,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:33,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:33,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:33,354 INFO L87 Difference]: Start difference. First operand 399 states and 800 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:34,660 INFO L93 Difference]: Finished difference Result 794 states and 1560 transitions. [2022-01-18 17:41:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:41:34,661 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:34,662 INFO L225 Difference]: With dead ends: 794 [2022-01-18 17:41:34,662 INFO L226 Difference]: Without dead ends: 785 [2022-01-18 17:41:34,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=3756, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:41:34,662 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 438 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-18 17:41:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 413. [2022-01-18 17:41:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.004854368932039) internal successors, (826), 412 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 826 transitions. [2022-01-18 17:41:34,669 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 826 transitions. Word has length 30 [2022-01-18 17:41:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:34,670 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 826 transitions. [2022-01-18 17:41:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 826 transitions. [2022-01-18 17:41:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:34,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:34,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:34,694 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 17:41:34,892 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,SelfDestructingSolverStorable183 [2022-01-18 17:41:34,892 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash -509554389, now seen corresponding path program 172 times [2022-01-18 17:41:34,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:34,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173779461] [2022-01-18 17:41:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:34,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:35,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173779461] [2022-01-18 17:41:35,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173779461] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:35,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966004641] [2022-01-18 17:41:35,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:41:35,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:35,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:35,198 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 17:41:35,199 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 17:41:35,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:41:35,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:35,386 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 17:41:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:35,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:36,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:36,085 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 28 treesize of output 30 [2022-01-18 17:41:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:36,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966004641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:36,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:36,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:36,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055699133] [2022-01-18 17:41:36,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:36,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:36,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:36,252 INFO L87 Difference]: Start difference. First operand 413 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:37,758 INFO L93 Difference]: Finished difference Result 672 states and 1328 transitions. [2022-01-18 17:41:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:41:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:41:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:37,760 INFO L225 Difference]: With dead ends: 672 [2022-01-18 17:41:37,760 INFO L226 Difference]: Without dead ends: 657 [2022-01-18 17:41:37,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=430, Invalid=3730, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:41:37,761 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 143 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:37,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 457 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:41:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-01-18 17:41:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 411. [2022-01-18 17:41:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.004878048780488) internal successors, (822), 410 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 822 transitions. [2022-01-18 17:41:37,767 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 822 transitions. Word has length 30 [2022-01-18 17:41:37,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:37,767 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 822 transitions. [2022-01-18 17:41:37,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 822 transitions. [2022-01-18 17:41:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:37,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:37,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:37,790 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 17:41:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:37,984 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash 959112329, now seen corresponding path program 173 times [2022-01-18 17:41:37,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796627129] [2022-01-18 17:41:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:37,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:38,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796627129] [2022-01-18 17:41:38,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796627129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991429366] [2022-01-18 17:41:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:41:38,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:38,294 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 17:41:38,294 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 17:41:38,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:41:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:38,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:38,505 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 17:41:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:38,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:39,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:39,225 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 28 treesize of output 30 [2022-01-18 17:41:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:39,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991429366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:39,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:39,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:41:39,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749321363] [2022-01-18 17:41:39,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:39,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:41:39,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:41:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:41:39,378 INFO L87 Difference]: Start difference. First operand 411 states and 822 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:40,593 INFO L93 Difference]: Finished difference Result 719 states and 1409 transitions. [2022-01-18 17:41:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:41:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:40,594 INFO L225 Difference]: With dead ends: 719 [2022-01-18 17:41:40,594 INFO L226 Difference]: Without dead ends: 701 [2022-01-18 17:41:40,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:41:40,595 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:40,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 505 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1683 Invalid, 0 Unknown, 76 Unchecked, 0.6s Time] [2022-01-18 17:41:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-01-18 17:41:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 425. [2022-01-18 17:41:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.9858490566037736) internal successors, (842), 424 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 842 transitions. [2022-01-18 17:41:40,599 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 842 transitions. Word has length 30 [2022-01-18 17:41:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:40,600 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 842 transitions. [2022-01-18 17:41:40,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 842 transitions. [2022-01-18 17:41:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:40,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:40,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:40,615 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 17:41:40,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:40,801 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:40,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1936553865, now seen corresponding path program 174 times [2022-01-18 17:41:40,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:40,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249989704] [2022-01-18 17:41:40,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:40,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:41,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249989704] [2022-01-18 17:41:41,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249989704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237988486] [2022-01-18 17:41:41,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:41:41,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:41,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:41,105 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 17:41:41,106 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 17:41:41,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:41:41,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:41,280 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 17:41:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:41,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:41,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:41,927 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 28 treesize of output 30 [2022-01-18 17:41:42,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:42,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237988486] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:42,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:42,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:41:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30472200] [2022-01-18 17:41:42,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:42,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:41:42,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:41:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:41:42,077 INFO L87 Difference]: Start difference. First operand 425 states and 842 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:43,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:43,302 INFO L93 Difference]: Finished difference Result 780 states and 1536 transitions. [2022-01-18 17:41:43,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:41:43,302 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:43,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:43,303 INFO L225 Difference]: With dead ends: 780 [2022-01-18 17:41:43,303 INFO L226 Difference]: Without dead ends: 748 [2022-01-18 17:41:43,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=394, Invalid=3266, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:41:43,304 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 132 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:43,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 493 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-01-18 17:41:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 403. [2022-01-18 17:41:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0049751243781095) internal successors, (806), 402 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 806 transitions. [2022-01-18 17:41:43,313 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 806 transitions. Word has length 30 [2022-01-18 17:41:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:43,314 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 806 transitions. [2022-01-18 17:41:43,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:43,314 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 806 transitions. [2022-01-18 17:41:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:43,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:43,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:43,330 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 17:41:43,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:43,515 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1387562039, now seen corresponding path program 175 times [2022-01-18 17:41:43,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:43,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705471213] [2022-01-18 17:41:43,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:43,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:43,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705471213] [2022-01-18 17:41:43,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705471213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615761860] [2022-01-18 17:41:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:41:43,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:43,827 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 17:41:43,827 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 17:41:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:44,009 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 17:41:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:44,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:44,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:44,685 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 28 treesize of output 30 [2022-01-18 17:41:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:44,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615761860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:44,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:44,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:44,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259826440] [2022-01-18 17:41:44,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:44,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:44,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:44,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:44,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:44,844 INFO L87 Difference]: Start difference. First operand 403 states and 806 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:45,912 INFO L93 Difference]: Finished difference Result 776 states and 1531 transitions. [2022-01-18 17:41:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 17:41:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:45,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:45,913 INFO L225 Difference]: With dead ends: 776 [2022-01-18 17:41:45,913 INFO L226 Difference]: Without dead ends: 743 [2022-01-18 17:41:45,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=3397, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:41:45,913 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 139 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:45,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 357 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:41:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-18 17:41:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 401. [2022-01-18 17:41:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.005) internal successors, (802), 400 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 802 transitions. [2022-01-18 17:41:45,932 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 802 transitions. Word has length 30 [2022-01-18 17:41:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:45,932 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 802 transitions. [2022-01-18 17:41:45,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:45,932 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 802 transitions. [2022-01-18 17:41:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:45,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:45,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:45,948 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 17:41:46,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:46,133 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash 567896517, now seen corresponding path program 176 times [2022-01-18 17:41:46,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:46,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881797830] [2022-01-18 17:41:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:46,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:46,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881797830] [2022-01-18 17:41:46,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881797830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928853406] [2022-01-18 17:41:46,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:41:46,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:46,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:46,460 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 17:41:46,461 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 17:41:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:41:46,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:46,646 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 17:41:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:47,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:47,407 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 28 treesize of output 30 [2022-01-18 17:41:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:47,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928853406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:47,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:47,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:41:47,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565185083] [2022-01-18 17:41:47,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:47,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:41:47,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:41:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:41:47,574 INFO L87 Difference]: Start difference. First operand 401 states and 802 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:48,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:48,705 INFO L93 Difference]: Finished difference Result 752 states and 1483 transitions. [2022-01-18 17:41:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:41:48,706 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:48,706 INFO L225 Difference]: With dead ends: 752 [2022-01-18 17:41:48,706 INFO L226 Difference]: Without dead ends: 731 [2022-01-18 17:41:48,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=394, Invalid=3766, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:41:48,707 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 123 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:48,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 501 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1426 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-01-18 17:41:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-01-18 17:41:48,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 417. [2022-01-18 17:41:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9831730769230769) internal successors, (825), 416 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 825 transitions. [2022-01-18 17:41:48,711 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 825 transitions. Word has length 30 [2022-01-18 17:41:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:48,712 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 825 transitions. [2022-01-18 17:41:48,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 825 transitions. [2022-01-18 17:41:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:48,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:48,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:48,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-01-18 17:41:48,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:48,912 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:48,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1858049183, now seen corresponding path program 177 times [2022-01-18 17:41:48,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:48,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995158991] [2022-01-18 17:41:48,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:48,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:49,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995158991] [2022-01-18 17:41:49,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995158991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274014412] [2022-01-18 17:41:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:41:49,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:49,256 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 17:41:49,256 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 17:41:49,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:41:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:49,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:49,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:49,446 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 17:41:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:49,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:50,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:50,192 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 28 treesize of output 30 [2022-01-18 17:41:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274014412] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:50,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:50,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:41:50,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748434918] [2022-01-18 17:41:50,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:50,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:41:50,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:41:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:41:50,347 INFO L87 Difference]: Start difference. First operand 417 states and 825 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:51,626 INFO L93 Difference]: Finished difference Result 749 states and 1481 transitions. [2022-01-18 17:41:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 17:41:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 17:41:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:51,627 INFO L225 Difference]: With dead ends: 749 [2022-01-18 17:41:51,628 INFO L226 Difference]: Without dead ends: 726 [2022-01-18 17:41:51,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=410, Invalid=3880, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 17:41:51,628 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 105 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:51,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 513 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:41:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-01-18 17:41:51,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 397. [2022-01-18 17:41:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.007575757575758) internal successors, (795), 396 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 795 transitions. [2022-01-18 17:41:51,633 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 795 transitions. Word has length 30 [2022-01-18 17:41:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:51,633 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 795 transitions. [2022-01-18 17:41:51,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 45 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 795 transitions. [2022-01-18 17:41:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:51,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:51,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:51,648 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 17:41:51,833 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,SelfDestructingSolverStorable189 [2022-01-18 17:41:51,834 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash 854882193, now seen corresponding path program 178 times [2022-01-18 17:41:51,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:51,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575814427] [2022-01-18 17:41:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:51,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:52,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575814427] [2022-01-18 17:41:52,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575814427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:52,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84536301] [2022-01-18 17:41:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:41:52,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:52,154 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 17:41:52,155 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 17:41:52,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:41:52,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:41:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:52,364 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 17:41:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:52,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:53,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:53,015 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 28 treesize of output 30 [2022-01-18 17:41:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:53,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84536301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:53,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:53,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661158324] [2022-01-18 17:41:53,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:53,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:53,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:53,167 INFO L87 Difference]: Start difference. First operand 397 states and 795 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:41:55,691 INFO L93 Difference]: Finished difference Result 978 states and 1927 transitions. [2022-01-18 17:41:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:41:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:41:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:41:55,693 INFO L225 Difference]: With dead ends: 978 [2022-01-18 17:41:55,693 INFO L226 Difference]: Without dead ends: 969 [2022-01-18 17:41:55,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=739, Invalid=6067, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:41:55,694 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:41:55,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 450 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:41:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-01-18 17:41:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 415. [2022-01-18 17:41:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0193236714975846) internal successors, (836), 414 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 836 transitions. [2022-01-18 17:41:55,699 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 836 transitions. Word has length 30 [2022-01-18 17:41:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:41:55,699 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 836 transitions. [2022-01-18 17:41:55,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:41:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 836 transitions. [2022-01-18 17:41:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:41:55,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:41:55,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:41:55,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-01-18 17:41:55,900 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,SelfDestructingSolverStorable190 [2022-01-18 17:41:55,900 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:41:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:41:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1736947917, now seen corresponding path program 179 times [2022-01-18 17:41:55,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:41:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267005215] [2022-01-18 17:41:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:41:55,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:41:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:41:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:56,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:41:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267005215] [2022-01-18 17:41:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267005215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:41:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584640195] [2022-01-18 17:41:56,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:41:56,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:41:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:41:56,201 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 17:41:56,201 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 17:41:56,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:41:56,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:41:56,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:41:56,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:41:56,415 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 17:41:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:56,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:41:57,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:41:57,176 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 28 treesize of output 30 [2022-01-18 17:41:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:41:57,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584640195] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:41:57,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:41:57,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:41:57,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161008163] [2022-01-18 17:41:57,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:41:57,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:41:57,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:41:57,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:41:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:41:57,329 INFO L87 Difference]: Start difference. First operand 415 states and 836 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:00,020 INFO L93 Difference]: Finished difference Result 816 states and 1607 transitions. [2022-01-18 17:42:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 17:42:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:00,021 INFO L225 Difference]: With dead ends: 816 [2022-01-18 17:42:00,021 INFO L226 Difference]: Without dead ends: 791 [2022-01-18 17:42:00,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=776, Invalid=6196, Unknown=0, NotChecked=0, Total=6972 [2022-01-18 17:42:00,022 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 250 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:00,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 451 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2305 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2022-01-18 17:42:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-18 17:42:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 413. [2022-01-18 17:42:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0194174757281553) internal successors, (832), 412 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 832 transitions. [2022-01-18 17:42:00,027 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 832 transitions. Word has length 30 [2022-01-18 17:42:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 832 transitions. [2022-01-18 17:42:00,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 832 transitions. [2022-01-18 17:42:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:00,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:00,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:00,044 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 17:42:00,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:00,231 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1089352661, now seen corresponding path program 180 times [2022-01-18 17:42:00,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:00,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458330411] [2022-01-18 17:42:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:00,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:00,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458330411] [2022-01-18 17:42:00,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458330411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:00,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176235060] [2022-01-18 17:42:00,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:00,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:00,546 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 17:42:00,546 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 17:42:00,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:42:00,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:00,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:00,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:00,755 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 17:42:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:01,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:01,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:01,473 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 33 treesize of output 33 [2022-01-18 17:42:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:01,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176235060] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:01,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:01,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-01-18 17:42:01,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752777763] [2022-01-18 17:42:01,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:01,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-18 17:42:01,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-18 17:42:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 17:42:01,625 INFO L87 Difference]: Start difference. First operand 413 states and 832 transitions. Second operand has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:04,544 INFO L93 Difference]: Finished difference Result 1107 states and 2170 transitions. [2022-01-18 17:42:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-18 17:42:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:04,545 INFO L225 Difference]: With dead ends: 1107 [2022-01-18 17:42:04,545 INFO L226 Difference]: Without dead ends: 1055 [2022-01-18 17:42:04,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1198, Invalid=8114, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 17:42:04,546 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 326 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 2919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:04,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 489 Invalid, 2919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:42:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-01-18 17:42:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 412. [2022-01-18 17:42:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.004866180048662) internal successors, (824), 411 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 824 transitions. [2022-01-18 17:42:04,552 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 824 transitions. Word has length 30 [2022-01-18 17:42:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:04,552 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 824 transitions. [2022-01-18 17:42:04,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.711111111111111) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 824 transitions. [2022-01-18 17:42:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:04,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:04,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:04,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-01-18 17:42:04,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:04,753 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:04,754 INFO L85 PathProgramCache]: Analyzing trace with hash -200734271, now seen corresponding path program 181 times [2022-01-18 17:42:04,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:04,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193548593] [2022-01-18 17:42:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:04,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:05,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193548593] [2022-01-18 17:42:05,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193548593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:05,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975601902] [2022-01-18 17:42:05,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:05,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:05,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:05,055 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 17:42:05,057 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 17:42:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:05,267 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 17:42:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:05,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:05,926 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:05,926 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 28 treesize of output 30 [2022-01-18 17:42:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975601902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:06,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387803301] [2022-01-18 17:42:06,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:06,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:06,089 INFO L87 Difference]: Start difference. First operand 412 states and 824 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:07,888 INFO L93 Difference]: Finished difference Result 851 states and 1676 transitions. [2022-01-18 17:42:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:42:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:07,889 INFO L225 Difference]: With dead ends: 851 [2022-01-18 17:42:07,889 INFO L226 Difference]: Without dead ends: 842 [2022-01-18 17:42:07,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=547, Invalid=4855, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:42:07,890 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 192 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:07,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 357 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-01-18 17:42:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 414. [2022-01-18 17:42:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.002421307506053) internal successors, (827), 413 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 827 transitions. [2022-01-18 17:42:07,895 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 827 transitions. Word has length 30 [2022-01-18 17:42:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:07,895 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 827 transitions. [2022-01-18 17:42:07,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 827 transitions. [2022-01-18 17:42:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:07,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:07,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:07,910 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 17:42:08,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:08,096 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash 681331453, now seen corresponding path program 182 times [2022-01-18 17:42:08,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:08,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877491670] [2022-01-18 17:42:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:08,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:08,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:08,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:08,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877491670] [2022-01-18 17:42:08,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877491670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:08,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454100847] [2022-01-18 17:42:08,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:08,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:08,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:08,400 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 17:42:08,401 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 17:42:08,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:08,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:08,614 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 17:42:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:08,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:09,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:09,312 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 28 treesize of output 30 [2022-01-18 17:42:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454100847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:09,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:09,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:09,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982870447] [2022-01-18 17:42:09,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:09,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:09,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:09,472 INFO L87 Difference]: Start difference. First operand 414 states and 827 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:12,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:12,326 INFO L93 Difference]: Finished difference Result 992 states and 1978 transitions. [2022-01-18 17:42:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 17:42:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:12,327 INFO L225 Difference]: With dead ends: 992 [2022-01-18 17:42:12,327 INFO L226 Difference]: Without dead ends: 959 [2022-01-18 17:42:12,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=722, Invalid=6084, Unknown=0, NotChecked=0, Total=6806 [2022-01-18 17:42:12,328 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:12,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 540 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2425 Invalid, 0 Unknown, 85 Unchecked, 0.9s Time] [2022-01-18 17:42:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-01-18 17:42:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 404. [2022-01-18 17:42:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.0148883374689825) internal successors, (812), 403 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 812 transitions. [2022-01-18 17:42:12,333 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 812 transitions. Word has length 30 [2022-01-18 17:42:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:12,333 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 812 transitions. [2022-01-18 17:42:12,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 812 transitions. [2022-01-18 17:42:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:12,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:12,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:12,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-01-18 17:42:12,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:12,535 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash -196676197, now seen corresponding path program 183 times [2022-01-18 17:42:12,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:12,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794223025] [2022-01-18 17:42:12,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:12,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:12,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794223025] [2022-01-18 17:42:12,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794223025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417516512] [2022-01-18 17:42:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:12,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:12,856 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 17:42:12,857 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 17:42:12,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:42:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:13,066 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 17:42:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:13,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:13,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:13,718 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 28 treesize of output 30 [2022-01-18 17:42:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:13,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417516512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:13,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311475473] [2022-01-18 17:42:13,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:13,870 INFO L87 Difference]: Start difference. First operand 404 states and 812 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:15,817 INFO L93 Difference]: Finished difference Result 832 states and 1644 transitions. [2022-01-18 17:42:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 17:42:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:15,818 INFO L225 Difference]: With dead ends: 832 [2022-01-18 17:42:15,818 INFO L226 Difference]: Without dead ends: 815 [2022-01-18 17:42:15,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=597, Invalid=5103, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 17:42:15,819 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 168 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:15,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 507 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1724 Invalid, 0 Unknown, 348 Unchecked, 0.7s Time] [2022-01-18 17:42:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-18 17:42:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 418. [2022-01-18 17:42:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.9952038369304557) internal successors, (832), 417 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 832 transitions. [2022-01-18 17:42:15,824 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 832 transitions. Word has length 30 [2022-01-18 17:42:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:15,824 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 832 transitions. [2022-01-18 17:42:15,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 832 transitions. [2022-01-18 17:42:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:15,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:15,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:15,840 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 17:42:16,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:16,025 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:16,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1672345399, now seen corresponding path program 184 times [2022-01-18 17:42:16,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:16,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757149239] [2022-01-18 17:42:16,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:16,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:16,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:16,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757149239] [2022-01-18 17:42:16,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757149239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:16,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302125328] [2022-01-18 17:42:16,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:16,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:16,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:16,317 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 17:42:16,318 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 17:42:16,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:16,530 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 17:42:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:16,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:17,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:17,183 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 28 treesize of output 30 [2022-01-18 17:42:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302125328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:17,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948324656] [2022-01-18 17:42:17,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:17,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:17,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:17,342 INFO L87 Difference]: Start difference. First operand 418 states and 832 transitions. Second operand has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:19,162 INFO L93 Difference]: Finished difference Result 836 states and 1653 transitions. [2022-01-18 17:42:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:42:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 17:42:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:19,163 INFO L225 Difference]: With dead ends: 836 [2022-01-18 17:42:19,163 INFO L226 Difference]: Without dead ends: 815 [2022-01-18 17:42:19,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=548, Invalid=4708, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:42:19,164 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 184 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:19,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 408 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:19,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-01-18 17:42:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 401. [2022-01-18 17:42:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0175) internal successors, (807), 400 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 807 transitions. [2022-01-18 17:42:19,169 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 807 transitions. Word has length 30 [2022-01-18 17:42:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:19,169 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 807 transitions. [2022-01-18 17:42:19,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 807 transitions. [2022-01-18 17:42:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:19,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:19,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:19,185 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 17:42:19,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:19,370 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash 289461307, now seen corresponding path program 185 times [2022-01-18 17:42:19,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:19,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550021370] [2022-01-18 17:42:19,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:19,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:19,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550021370] [2022-01-18 17:42:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550021370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398278472] [2022-01-18 17:42:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:19,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:19,668 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 17:42:19,669 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 17:42:19,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:19,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:19,879 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 17:42:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:20,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:20,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:20,604 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 28 treesize of output 30 [2022-01-18 17:42:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398278472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:20,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:20,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:20,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551497779] [2022-01-18 17:42:20,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:20,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:20,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:20,762 INFO L87 Difference]: Start difference. First operand 401 states and 807 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:22,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:22,674 INFO L93 Difference]: Finished difference Result 850 states and 1672 transitions. [2022-01-18 17:42:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:42:22,675 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:22,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:22,676 INFO L225 Difference]: With dead ends: 850 [2022-01-18 17:42:22,676 INFO L226 Difference]: Without dead ends: 841 [2022-01-18 17:42:22,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=475, Invalid=4637, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:42:22,676 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 2540 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:22,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 573 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:42:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-01-18 17:42:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2022-01-18 17:42:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0120772946859904) internal successors, (833), 414 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 833 transitions. [2022-01-18 17:42:22,682 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 833 transitions. Word has length 30 [2022-01-18 17:42:22,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:22,682 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 833 transitions. [2022-01-18 17:42:22,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:22,682 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 833 transitions. [2022-01-18 17:42:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:22,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:22,682 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:22,698 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 17:42:22,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:22,883 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1171527031, now seen corresponding path program 186 times [2022-01-18 17:42:22,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:22,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176874425] [2022-01-18 17:42:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:22,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176874425] [2022-01-18 17:42:23,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176874425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889993519] [2022-01-18 17:42:23,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:23,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:23,191 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 17:42:23,191 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 17:42:23,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:42:23,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:23,413 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 17:42:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:23,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:24,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:24,100 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 28 treesize of output 30 [2022-01-18 17:42:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:24,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889993519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:24,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:24,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:24,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476231527] [2022-01-18 17:42:24,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:24,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:24,252 INFO L87 Difference]: Start difference. First operand 415 states and 833 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:26,226 INFO L93 Difference]: Finished difference Result 721 states and 1421 transitions. [2022-01-18 17:42:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:42:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:26,227 INFO L225 Difference]: With dead ends: 721 [2022-01-18 17:42:26,227 INFO L226 Difference]: Without dead ends: 696 [2022-01-18 17:42:26,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=527, Invalid=4875, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 17:42:26,228 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 187 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:26,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 443 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2071 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-01-18 17:42:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-18 17:42:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 413. [2022-01-18 17:42:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.012135922330097) internal successors, (829), 412 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 829 transitions. [2022-01-18 17:42:26,232 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 829 transitions. Word has length 30 [2022-01-18 17:42:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:26,232 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 829 transitions. [2022-01-18 17:42:26,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:26,232 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 829 transitions. [2022-01-18 17:42:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:26,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:26,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:26,248 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 17:42:26,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:26,433 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1654773547, now seen corresponding path program 187 times [2022-01-18 17:42:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803453551] [2022-01-18 17:42:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:26,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:26,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803453551] [2022-01-18 17:42:26,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803453551] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:26,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682794655] [2022-01-18 17:42:26,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:26,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:26,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:26,733 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 17:42:26,733 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 17:42:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:26,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:26,934 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 17:42:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:27,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:27,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:27,536 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 28 treesize of output 30 [2022-01-18 17:42:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682794655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:27,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:27,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:42:27,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535919471] [2022-01-18 17:42:27,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:27,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:42:27,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:42:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:42:27,681 INFO L87 Difference]: Start difference. First operand 413 states and 829 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:29,260 INFO L93 Difference]: Finished difference Result 849 states and 1674 transitions. [2022-01-18 17:42:29,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:42:29,260 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:29,261 INFO L225 Difference]: With dead ends: 849 [2022-01-18 17:42:29,261 INFO L226 Difference]: Without dead ends: 804 [2022-01-18 17:42:29,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=4091, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 17:42:29,261 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 164 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:29,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 456 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-18 17:42:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 405. [2022-01-18 17:42:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.012376237623762) internal successors, (813), 404 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 813 transitions. [2022-01-18 17:42:29,266 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 813 transitions. Word has length 30 [2022-01-18 17:42:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:29,266 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 813 transitions. [2022-01-18 17:42:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 813 transitions. [2022-01-18 17:42:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:29,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:29,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:29,289 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 17:42:29,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-01-18 17:42:29,487 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:29,487 INFO L85 PathProgramCache]: Analyzing trace with hash 293519381, now seen corresponding path program 188 times [2022-01-18 17:42:29,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:29,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343617137] [2022-01-18 17:42:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:29,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:29,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:29,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343617137] [2022-01-18 17:42:29,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343617137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:29,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021857162] [2022-01-18 17:42:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:29,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:29,781 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 17:42:29,781 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 17:42:29,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:29,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:29,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:29,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:29,991 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 17:42:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:30,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:30,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:30,646 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 28 treesize of output 30 [2022-01-18 17:42:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:30,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021857162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:30,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:30,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:30,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490033622] [2022-01-18 17:42:30,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:30,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:30,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:30,802 INFO L87 Difference]: Start difference. First operand 405 states and 813 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:32,454 INFO L93 Difference]: Finished difference Result 832 states and 1643 transitions. [2022-01-18 17:42:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:42:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:32,455 INFO L225 Difference]: With dead ends: 832 [2022-01-18 17:42:32,455 INFO L226 Difference]: Without dead ends: 799 [2022-01-18 17:42:32,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=456, Invalid=4236, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:42:32,455 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 149 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:32,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 481 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-01-18 17:42:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 403. [2022-01-18 17:42:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.012437810945274) internal successors, (809), 402 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 809 transitions. [2022-01-18 17:42:32,461 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 809 transitions. Word has length 30 [2022-01-18 17:42:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 809 transitions. [2022-01-18 17:42:32,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 809 transitions. [2022-01-18 17:42:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:32,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:32,462 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:32,480 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 17:42:32,665 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,SelfDestructingSolverStorable200 [2022-01-18 17:42:32,666 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:32,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2045989359, now seen corresponding path program 189 times [2022-01-18 17:42:32,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:32,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921407705] [2022-01-18 17:42:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:32,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:32,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921407705] [2022-01-18 17:42:32,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921407705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117544] [2022-01-18 17:42:32,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:32,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:32,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:32,979 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 17:42:32,980 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 17:42:33,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:42:33,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:33,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:33,198 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 17:42:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:33,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:33,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:33,912 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 28 treesize of output 30 [2022-01-18 17:42:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:34,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117544] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:34,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:34,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:42:34,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480988089] [2022-01-18 17:42:34,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:34,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:42:34,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:42:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:42:34,071 INFO L87 Difference]: Start difference. First operand 403 states and 809 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:35,946 INFO L93 Difference]: Finished difference Result 833 states and 1644 transitions. [2022-01-18 17:42:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:42:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:35,947 INFO L225 Difference]: With dead ends: 833 [2022-01-18 17:42:35,947 INFO L226 Difference]: Without dead ends: 797 [2022-01-18 17:42:35,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=481, Invalid=4775, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 17:42:35,947 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 2589 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:35,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 667 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2589 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 17:42:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-01-18 17:42:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 400. [2022-01-18 17:42:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.0150375939849625) internal successors, (804), 399 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 804 transitions. [2022-01-18 17:42:35,952 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 804 transitions. Word has length 30 [2022-01-18 17:42:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:35,953 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 804 transitions. [2022-01-18 17:42:35,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 804 transitions. [2022-01-18 17:42:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:35,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:35,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:35,969 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 17:42:36,153 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,SelfDestructingSolverStorable201 [2022-01-18 17:42:36,154 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1389143995, now seen corresponding path program 190 times [2022-01-18 17:42:36,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:36,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084147859] [2022-01-18 17:42:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:36,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:36,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084147859] [2022-01-18 17:42:36,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084147859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080849063] [2022-01-18 17:42:36,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:36,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:36,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:36,457 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 17:42:36,462 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 17:42:36,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:36,698 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 17:42:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:37,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:37,317 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 28 treesize of output 30 [2022-01-18 17:42:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:37,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080849063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:37,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:37,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:37,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317279989] [2022-01-18 17:42:37,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:37,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:37,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:37,476 INFO L87 Difference]: Start difference. First operand 400 states and 804 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:38,913 INFO L93 Difference]: Finished difference Result 841 states and 1649 transitions. [2022-01-18 17:42:38,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:42:38,914 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:38,915 INFO L225 Difference]: With dead ends: 841 [2022-01-18 17:42:38,915 INFO L226 Difference]: Without dead ends: 832 [2022-01-18 17:42:38,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=4286, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:42:38,915 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 174 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:38,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 442 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:42:38,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-18 17:42:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 429. [2022-01-18 17:42:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0093457943925235) internal successors, (860), 428 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 860 transitions. [2022-01-18 17:42:38,921 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 860 transitions. Word has length 30 [2022-01-18 17:42:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:38,921 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 860 transitions. [2022-01-18 17:42:38,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 860 transitions. [2022-01-18 17:42:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:38,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:38,922 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:38,951 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 17:42:39,143 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,SelfDestructingSolverStorable202 [2022-01-18 17:42:39,143 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:39,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:39,144 INFO L85 PathProgramCache]: Analyzing trace with hash -507078271, now seen corresponding path program 191 times [2022-01-18 17:42:39,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:39,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917173123] [2022-01-18 17:42:39,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:39,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:39,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:39,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917173123] [2022-01-18 17:42:39,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917173123] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230876789] [2022-01-18 17:42:39,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:39,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:39,478 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 17:42:39,479 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 17:42:39,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:42:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:39,718 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 17:42:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:39,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:40,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:40,364 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 28 treesize of output 30 [2022-01-18 17:42:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230876789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:40,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:40,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285273239] [2022-01-18 17:42:40,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:40,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:40,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:40,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1634, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:40,519 INFO L87 Difference]: Start difference. First operand 429 states and 860 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:42,274 INFO L93 Difference]: Finished difference Result 687 states and 1351 transitions. [2022-01-18 17:42:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:42:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:42:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:42,275 INFO L225 Difference]: With dead ends: 687 [2022-01-18 17:42:42,275 INFO L226 Difference]: Without dead ends: 672 [2022-01-18 17:42:42,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=444, Invalid=4386, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:42:42,275 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:42,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 451 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-18 17:42:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 425. [2022-01-18 17:42:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2022-01-18 17:42:42,279 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 30 [2022-01-18 17:42:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2022-01-18 17:42:42,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2022-01-18 17:42:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:42,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:42,280 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:42,295 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 17:42:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:42,481 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash 961588447, now seen corresponding path program 192 times [2022-01-18 17:42:42,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845479657] [2022-01-18 17:42:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:42,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:42,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845479657] [2022-01-18 17:42:42,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845479657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:42,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617378256] [2022-01-18 17:42:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:42:42,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:42,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:42,781 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 17:42:42,781 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 17:42:42,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 17:42:42,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:42,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:43,009 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 17:42:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:43,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:43,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:43,580 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 28 treesize of output 30 [2022-01-18 17:42:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:43,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617378256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:43,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:43,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2022-01-18 17:42:43,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281858663] [2022-01-18 17:42:43,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:43,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-18 17:42:43,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-18 17:42:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 17:42:43,731 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:45,057 INFO L93 Difference]: Finished difference Result 848 states and 1662 transitions. [2022-01-18 17:42:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:42:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:45,058 INFO L225 Difference]: With dead ends: 848 [2022-01-18 17:42:45,058 INFO L226 Difference]: Without dead ends: 803 [2022-01-18 17:42:45,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=379, Invalid=3527, Unknown=0, NotChecked=0, Total=3906 [2022-01-18 17:42:45,059 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:45,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 469 Invalid, 1798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:42:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-18 17:42:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 412. [2022-01-18 17:42:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.0097323600973236) internal successors, (826), 411 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 826 transitions. [2022-01-18 17:42:45,064 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 826 transitions. Word has length 30 [2022-01-18 17:42:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:45,064 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 826 transitions. [2022-01-18 17:42:45,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.853658536585366) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 826 transitions. [2022-01-18 17:42:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:45,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:45,065 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:45,080 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 17:42:45,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:45,265 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1385085921, now seen corresponding path program 193 times [2022-01-18 17:42:45,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:45,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525330377] [2022-01-18 17:42:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:45,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:45,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525330377] [2022-01-18 17:42:45,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525330377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:45,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095260406] [2022-01-18 17:42:45,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:42:45,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:45,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:45,563 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 17:42:45,564 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 17:42:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:45,810 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 17:42:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:46,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:46,447 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 28 treesize of output 30 [2022-01-18 17:42:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095260406] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:46,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:46,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:42:46,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286981816] [2022-01-18 17:42:46,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:46,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:42:46,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:46,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:42:46,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1630, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:42:46,600 INFO L87 Difference]: Start difference. First operand 412 states and 826 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:48,078 INFO L93 Difference]: Finished difference Result 852 states and 1666 transitions. [2022-01-18 17:42:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:42:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:48,080 INFO L225 Difference]: With dead ends: 852 [2022-01-18 17:42:48,080 INFO L226 Difference]: Without dead ends: 819 [2022-01-18 17:42:48,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=402, Invalid=4020, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 17:42:48,080 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:48,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 527 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-01-18 17:42:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 409. [2022-01-18 17:42:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0098039215686274) internal successors, (820), 408 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 820 transitions. [2022-01-18 17:42:48,085 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 820 transitions. Word has length 30 [2022-01-18 17:42:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 820 transitions. [2022-01-18 17:42:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 820 transitions. [2022-01-18 17:42:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:48,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:48,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:48,101 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 17:42:48,286 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,SelfDestructingSolverStorable205 [2022-01-18 17:42:48,286 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:48,286 INFO L85 PathProgramCache]: Analyzing trace with hash 570372635, now seen corresponding path program 194 times [2022-01-18 17:42:48,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:48,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395007936] [2022-01-18 17:42:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:48,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:48,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395007936] [2022-01-18 17:42:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395007936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930553609] [2022-01-18 17:42:48,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:42:48,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:48,603 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 17:42:48,604 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 17:42:48,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:42:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:48,850 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 17:42:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:49,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:49,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:49,535 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 28 treesize of output 30 [2022-01-18 17:42:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:49,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930553609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:49,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:49,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 45 [2022-01-18 17:42:49,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670285825] [2022-01-18 17:42:49,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:49,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-18 17:42:49,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-18 17:42:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1881, Unknown=0, NotChecked=0, Total=2070 [2022-01-18 17:42:49,701 INFO L87 Difference]: Start difference. First operand 409 states and 820 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:51,471 INFO L93 Difference]: Finished difference Result 850 states and 1662 transitions. [2022-01-18 17:42:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 17:42:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:51,472 INFO L225 Difference]: With dead ends: 850 [2022-01-18 17:42:51,473 INFO L226 Difference]: Without dead ends: 814 [2022-01-18 17:42:51,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=427, Invalid=4543, Unknown=0, NotChecked=0, Total=4970 [2022-01-18 17:42:51,473 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:51,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 738 Invalid, 2762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:42:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-01-18 17:42:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 406. [2022-01-18 17:42:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 815 transitions. [2022-01-18 17:42:51,480 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 815 transitions. Word has length 30 [2022-01-18 17:42:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:51,480 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 815 transitions. [2022-01-18 17:42:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 45 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 815 transitions. [2022-01-18 17:42:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:51,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:51,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:51,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 17:42:51,687 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,SelfDestructingSolverStorable206 [2022-01-18 17:42:51,687 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:51,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 86969375, now seen corresponding path program 195 times [2022-01-18 17:42:51,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:51,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89777255] [2022-01-18 17:42:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:51,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:51,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:51,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89777255] [2022-01-18 17:42:51,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89777255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:52,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872099752] [2022-01-18 17:42:52,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:42:52,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:52,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:52,001 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 17:42:52,001 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 17:42:52,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 17:42:52,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:52,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:52,284 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 17:42:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:52,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:53,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:53,079 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 33 treesize of output 33 [2022-01-18 17:42:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:53,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872099752] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:53,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:53,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-01-18 17:42:53,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808614647] [2022-01-18 17:42:53,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:53,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-18 17:42:53,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:53,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-18 17:42:53,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2234, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 17:42:53,239 INFO L87 Difference]: Start difference. First operand 406 states and 815 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:55,111 INFO L93 Difference]: Finished difference Result 828 states and 1620 transitions. [2022-01-18 17:42:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 17:42:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 17:42:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:55,112 INFO L225 Difference]: With dead ends: 828 [2022-01-18 17:42:55,112 INFO L226 Difference]: Without dead ends: 821 [2022-01-18 17:42:55,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=452, Invalid=5098, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 17:42:55,113 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 2810 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:55,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 823 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2810 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-18 17:42:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-01-18 17:42:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 391. [2022-01-18 17:42:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0076923076923077) internal successors, (783), 390 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 783 transitions. [2022-01-18 17:42:55,118 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 783 transitions. Word has length 30 [2022-01-18 17:42:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:55,118 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 783 transitions. [2022-01-18 17:42:55,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 783 transitions. [2022-01-18 17:42:55,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:55,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:55,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:55,135 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 17:42:55,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:55,320 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:55,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:55,320 INFO L85 PathProgramCache]: Analyzing trace with hash -925882297, now seen corresponding path program 196 times [2022-01-18 17:42:55,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:55,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541691879] [2022-01-18 17:42:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:55,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:55,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541691879] [2022-01-18 17:42:55,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541691879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820103083] [2022-01-18 17:42:55,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:42:55,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:55,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:55,598 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 17:42:55,599 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 17:42:55,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:42:55,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:55,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:42:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:55,685 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 17:42:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:55,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:56,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:56,335 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 28 treesize of output 30 [2022-01-18 17:42:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:56,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820103083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:56,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:56,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:42:56,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759839924] [2022-01-18 17:42:56,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:56,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:42:56,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:56,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:42:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:42:56,461 INFO L87 Difference]: Start difference. First operand 391 states and 783 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:42:57,997 INFO L93 Difference]: Finished difference Result 800 states and 1577 transitions. [2022-01-18 17:42:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 17:42:57,998 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:42:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:42:57,999 INFO L225 Difference]: With dead ends: 800 [2022-01-18 17:42:57,999 INFO L226 Difference]: Without dead ends: 791 [2022-01-18 17:42:57,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=428, Invalid=3354, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:42:57,999 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:42:57,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 466 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:42:58,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-01-18 17:42:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 421. [2022-01-18 17:42:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.9976190476190476) internal successors, (839), 420 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 839 transitions. [2022-01-18 17:42:58,006 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 839 transitions. Word has length 30 [2022-01-18 17:42:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:42:58,006 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 839 transitions. [2022-01-18 17:42:58,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:42:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 839 transitions. [2022-01-18 17:42:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:42:58,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:42:58,007 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:42:58,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 17:42:58,219 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,SelfDestructingSolverStorable208 [2022-01-18 17:42:58,219 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:42:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:42:58,219 INFO L85 PathProgramCache]: Analyzing trace with hash -43816573, now seen corresponding path program 197 times [2022-01-18 17:42:58,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:42:58,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47482795] [2022-01-18 17:42:58,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:42:58,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:42:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:42:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:42:58,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47482795] [2022-01-18 17:42:58,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47482795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:42:58,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974162047] [2022-01-18 17:42:58,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:42:58,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:42:58,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:42:58,500 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 17:42:58,500 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 17:42:58,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:42:58,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:42:58,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:42:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:42:58,587 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 17:42:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:58,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:42:59,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:42:59,247 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 28 treesize of output 30 [2022-01-18 17:42:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:42:59,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974162047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:42:59,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:42:59,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:42:59,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194590688] [2022-01-18 17:42:59,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:42:59,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:42:59,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:42:59,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:42:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:42:59,376 INFO L87 Difference]: Start difference. First operand 421 states and 839 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:00,811 INFO L93 Difference]: Finished difference Result 685 states and 1361 transitions. [2022-01-18 17:43:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 17:43:00,811 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:00,812 INFO L225 Difference]: With dead ends: 685 [2022-01-18 17:43:00,812 INFO L226 Difference]: Without dead ends: 670 [2022-01-18 17:43:00,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=395, Invalid=2911, Unknown=0, NotChecked=0, Total=3306 [2022-01-18 17:43:00,812 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 143 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:00,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 344 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-01-18 17:43:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 419. [2022-01-18 17:43:00,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 1.9976076555023923) internal successors, (835), 418 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 835 transitions. [2022-01-18 17:43:00,816 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 835 transitions. Word has length 30 [2022-01-18 17:43:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:00,816 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 835 transitions. [2022-01-18 17:43:00,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 835 transitions. [2022-01-18 17:43:00,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:00,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:00,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:00,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:01,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:01,017 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:01,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1424850145, now seen corresponding path program 198 times [2022-01-18 17:43:01,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:01,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204041146] [2022-01-18 17:43:01,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:01,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:01,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:01,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204041146] [2022-01-18 17:43:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204041146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130393886] [2022-01-18 17:43:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:01,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:01,295 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 17:43:01,303 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 17:43:01,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:01,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:43:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:01,392 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 17:43:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:01,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:02,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:02,005 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 28 treesize of output 30 [2022-01-18 17:43:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:02,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130393886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:02,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:02,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-01-18 17:43:02,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880737280] [2022-01-18 17:43:02,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:02,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 17:43:02,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:02,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 17:43:02,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 17:43:02,134 INFO L87 Difference]: Start difference. First operand 419 states and 835 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:03,511 INFO L93 Difference]: Finished difference Result 805 states and 1580 transitions. [2022-01-18 17:43:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:43:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:43:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:03,512 INFO L225 Difference]: With dead ends: 805 [2022-01-18 17:43:03,512 INFO L226 Difference]: Without dead ends: 768 [2022-01-18 17:43:03,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:43:03,513 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 158 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:03,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 379 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1523 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-18 17:43:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 417. [2022-01-18 17:43:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.9975961538461537) internal successors, (831), 416 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 831 transitions. [2022-01-18 17:43:03,517 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 831 transitions. Word has length 30 [2022-01-18 17:43:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:03,518 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 831 transitions. [2022-01-18 17:43:03,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:03,518 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 831 transitions. [2022-01-18 17:43:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:03,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:03,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:03,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:03,718 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,SelfDestructingSolverStorable210 [2022-01-18 17:43:03,718 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:03,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1948415011, now seen corresponding path program 199 times [2022-01-18 17:43:03,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:03,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363764684] [2022-01-18 17:43:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:03,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:03,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363764684] [2022-01-18 17:43:03,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363764684] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:03,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064647393] [2022-01-18 17:43:03,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:03,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:03,996 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 17:43:03,997 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 17:43:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:04,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:04,083 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 17:43:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:04,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:04,710 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:04,710 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 28 treesize of output 30 [2022-01-18 17:43:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:04,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064647393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:04,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:04,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 34 [2022-01-18 17:43:04,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359604541] [2022-01-18 17:43:04,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:04,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:43:04,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:43:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:43:04,853 INFO L87 Difference]: Start difference. First operand 417 states and 831 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:06,211 INFO L93 Difference]: Finished difference Result 790 states and 1558 transitions. [2022-01-18 17:43:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:43:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:06,212 INFO L225 Difference]: With dead ends: 790 [2022-01-18 17:43:06,212 INFO L226 Difference]: Without dead ends: 747 [2022-01-18 17:43:06,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3249, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:06,213 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 159 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:06,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:43:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-01-18 17:43:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 402. [2022-01-18 17:43:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.002493765586035) internal successors, (803), 401 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 803 transitions. [2022-01-18 17:43:06,218 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 803 transitions. Word has length 30 [2022-01-18 17:43:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:06,218 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 803 transitions. [2022-01-18 17:43:06,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 803 transitions. [2022-01-18 17:43:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:06,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:06,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:06,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:06,418 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,SelfDestructingSolverStorable211 [2022-01-18 17:43:06,419 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:06,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1532131869, now seen corresponding path program 200 times [2022-01-18 17:43:06,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:06,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075198513] [2022-01-18 17:43:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:06,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:06,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:06,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075198513] [2022-01-18 17:43:06,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075198513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:06,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083016021] [2022-01-18 17:43:06,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:06,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:06,689 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 17:43:06,690 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 17:43:06,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:06,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:06,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:06,777 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 17:43:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:07,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:07,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:07,401 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 28 treesize of output 30 [2022-01-18 17:43:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:07,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083016021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:07,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:07,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-01-18 17:43:07,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449501793] [2022-01-18 17:43:07,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:07,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:43:07,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:07,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:43:07,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:43:07,527 INFO L87 Difference]: Start difference. First operand 402 states and 803 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:08,868 INFO L93 Difference]: Finished difference Result 818 states and 1607 transitions. [2022-01-18 17:43:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:43:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:08,869 INFO L225 Difference]: With dead ends: 818 [2022-01-18 17:43:08,869 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 17:43:08,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=3044, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:43:08,869 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:08,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 311 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 17:43:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 419. [2022-01-18 17:43:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2022-01-18 17:43:08,874 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2022-01-18 17:43:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:08,874 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2022-01-18 17:43:08,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2022-01-18 17:43:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:08,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:08,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:08,890 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 17:43:09,075 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,SelfDestructingSolverStorable212 [2022-01-18 17:43:09,075 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1880769703, now seen corresponding path program 201 times [2022-01-18 17:43:09,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046443869] [2022-01-18 17:43:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:09,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:09,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046443869] [2022-01-18 17:43:09,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046443869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44956221] [2022-01-18 17:43:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:09,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:09,348 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 17:43:09,349 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 17:43:09,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:09,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:09,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:09,439 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 17:43:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:09,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:10,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:10,174 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 33 treesize of output 33 [2022-01-18 17:43:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44956221] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:10,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:10,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 37 [2022-01-18 17:43:10,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760391735] [2022-01-18 17:43:10,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:10,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 17:43:10,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 17:43:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 17:43:10,312 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:11,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:11,943 INFO L93 Difference]: Finished difference Result 723 states and 1419 transitions. [2022-01-18 17:43:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-18 17:43:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:11,944 INFO L225 Difference]: With dead ends: 723 [2022-01-18 17:43:11,944 INFO L226 Difference]: Without dead ends: 708 [2022-01-18 17:43:11,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 11 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=511, Invalid=3649, Unknown=0, NotChecked=0, Total=4160 [2022-01-18 17:43:11,944 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 159 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:11,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 303 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-01-18 17:43:11,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 417. [2022-01-18 17:43:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2022-01-18 17:43:11,949 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2022-01-18 17:43:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:11,949 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2022-01-18 17:43:11,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:11,949 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2022-01-18 17:43:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:11,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:11,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:11,965 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 17:43:12,150 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,SelfDestructingSolverStorable213 [2022-01-18 17:43:12,150 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:12,150 INFO L85 PathProgramCache]: Analyzing trace with hash -412102985, now seen corresponding path program 202 times [2022-01-18 17:43:12,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:12,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574539701] [2022-01-18 17:43:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:12,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:12,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574539701] [2022-01-18 17:43:12,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574539701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450106483] [2022-01-18 17:43:12,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:12,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:12,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:12,421 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 17:43:12,422 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 17:43:12,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:12,509 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 17:43:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:12,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:13,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:13,128 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 28 treesize of output 30 [2022-01-18 17:43:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:13,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450106483] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:13,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:13,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-01-18 17:43:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964138421] [2022-01-18 17:43:13,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:13,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-18 17:43:13,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-18 17:43:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-01-18 17:43:13,255 INFO L87 Difference]: Start difference. First operand 417 states and 832 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:14,798 INFO L93 Difference]: Finished difference Result 825 states and 1613 transitions. [2022-01-18 17:43:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:43:14,798 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:43:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:14,799 INFO L225 Difference]: With dead ends: 825 [2022-01-18 17:43:14,799 INFO L226 Difference]: Without dead ends: 788 [2022-01-18 17:43:14,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 14 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=3129, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 17:43:14,800 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 164 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:14,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 434 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:43:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-18 17:43:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 415. [2022-01-18 17:43:14,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.0) internal successors, (828), 414 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 828 transitions. [2022-01-18 17:43:14,805 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 828 transitions. Word has length 30 [2022-01-18 17:43:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:14,805 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 828 transitions. [2022-01-18 17:43:14,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 828 transitions. [2022-01-18 17:43:14,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:14,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:14,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:14,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-01-18 17:43:15,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:15,006 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:15,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash 509599155, now seen corresponding path program 203 times [2022-01-18 17:43:15,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:15,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87622786] [2022-01-18 17:43:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:15,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:15,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87622786] [2022-01-18 17:43:15,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87622786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:15,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672241372] [2022-01-18 17:43:15,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:15,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:15,280 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 17:43:15,281 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 17:43:15,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:15,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:43:15,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:15,373 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 17:43:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:15,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:16,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:16,005 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 28 treesize of output 30 [2022-01-18 17:43:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:16,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672241372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:16,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:16,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-01-18 17:43:16,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301855380] [2022-01-18 17:43:16,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:16,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 17:43:16,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:16,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 17:43:16,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 17:43:16,134 INFO L87 Difference]: Start difference. First operand 415 states and 828 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:17,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:17,416 INFO L93 Difference]: Finished difference Result 804 states and 1581 transitions. [2022-01-18 17:43:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:43:17,416 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:17,417 INFO L225 Difference]: With dead ends: 804 [2022-01-18 17:43:17,417 INFO L226 Difference]: Without dead ends: 761 [2022-01-18 17:43:17,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=393, Invalid=3029, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 17:43:17,417 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 156 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:17,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 327 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 17:43:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2022-01-18 17:43:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 403. [2022-01-18 17:43:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0024875621890548) internal successors, (805), 402 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 805 transitions. [2022-01-18 17:43:17,422 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 805 transitions. Word has length 30 [2022-01-18 17:43:17,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:17,422 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 805 transitions. [2022-01-18 17:43:17,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:17,422 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 805 transitions. [2022-01-18 17:43:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:17,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:17,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:17,438 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 17:43:17,623 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,SelfDestructingSolverStorable215 [2022-01-18 17:43:17,623 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:17,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:17,623 INFO L85 PathProgramCache]: Analyzing trace with hash -765426365, now seen corresponding path program 204 times [2022-01-18 17:43:17,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:17,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160926969] [2022-01-18 17:43:17,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:17,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:17,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160926969] [2022-01-18 17:43:17,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160926969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064822013] [2022-01-18 17:43:17,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:17,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:17,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:17,907 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 17:43:17,907 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 17:43:17,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:17,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:17,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:43:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:17,999 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 17:43:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:18,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:18,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:18,658 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 28 treesize of output 30 [2022-01-18 17:43:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064822013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:18,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:18,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:43:18,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436369738] [2022-01-18 17:43:18,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:18,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:43:18,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:43:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:43:18,797 INFO L87 Difference]: Start difference. First operand 403 states and 805 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:20,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:20,822 INFO L93 Difference]: Finished difference Result 879 states and 1728 transitions. [2022-01-18 17:43:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 17:43:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:20,823 INFO L225 Difference]: With dead ends: 879 [2022-01-18 17:43:20,824 INFO L226 Difference]: Without dead ends: 870 [2022-01-18 17:43:20,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:43:20,824 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 177 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:20,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 433 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 17:43:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-18 17:43:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 417. [2022-01-18 17:43:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0048076923076925) internal successors, (834), 416 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 834 transitions. [2022-01-18 17:43:20,829 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 834 transitions. Word has length 30 [2022-01-18 17:43:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:20,829 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 834 transitions. [2022-01-18 17:43:20,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 834 transitions. [2022-01-18 17:43:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:20,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:20,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:20,845 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 17:43:21,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:21,030 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash 116639359, now seen corresponding path program 205 times [2022-01-18 17:43:21,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:21,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147398105] [2022-01-18 17:43:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:21,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:21,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147398105] [2022-01-18 17:43:21,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147398105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:21,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379354256] [2022-01-18 17:43:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:21,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:21,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:21,322 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 17:43:21,324 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 17:43:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:21,412 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 17:43:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:21,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:22,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:22,128 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 28 treesize of output 30 [2022-01-18 17:43:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:22,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379354256] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:22,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:22,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:43:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099480611] [2022-01-18 17:43:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:22,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:43:22,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:43:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:43:22,252 INFO L87 Difference]: Start difference. First operand 417 states and 834 transitions. Second operand has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:24,364 INFO L93 Difference]: Finished difference Result 736 states and 1455 transitions. [2022-01-18 17:43:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 17:43:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-18 17:43:24,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:24,365 INFO L225 Difference]: With dead ends: 736 [2022-01-18 17:43:24,365 INFO L226 Difference]: Without dead ends: 721 [2022-01-18 17:43:24,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=577, Invalid=4253, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 17:43:24,365 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 187 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:24,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 330 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:43:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-18 17:43:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 415. [2022-01-18 17:43:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.004830917874396) internal successors, (830), 414 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 830 transitions. [2022-01-18 17:43:24,370 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 830 transitions. Word has length 30 [2022-01-18 17:43:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:24,370 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 830 transitions. [2022-01-18 17:43:24,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 36 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 830 transitions. [2022-01-18 17:43:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:24,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:24,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:24,386 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 17:43:24,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:24,571 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1585306077, now seen corresponding path program 206 times [2022-01-18 17:43:24,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:24,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189334979] [2022-01-18 17:43:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:24,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:24,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189334979] [2022-01-18 17:43:24,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189334979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271845085] [2022-01-18 17:43:24,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 17:43:24,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:24,861 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 17:43:24,861 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 17:43:24,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 17:43:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:24,947 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 17:43:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:25,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:25,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:25,589 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 28 treesize of output 30 [2022-01-18 17:43:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:25,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271845085] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:25,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:25,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-01-18 17:43:25,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750794844] [2022-01-18 17:43:25,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:25,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-18 17:43:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-18 17:43:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 17:43:25,760 INFO L87 Difference]: Start difference. First operand 415 states and 830 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:27,808 INFO L93 Difference]: Finished difference Result 884 states and 1732 transitions. [2022-01-18 17:43:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 17:43:27,809 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:43:27,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:27,809 INFO L225 Difference]: With dead ends: 884 [2022-01-18 17:43:27,810 INFO L226 Difference]: Without dead ends: 823 [2022-01-18 17:43:27,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=589, Invalid=4523, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 17:43:27,810 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 206 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:27,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 435 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2005 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:43:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-18 17:43:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 414. [2022-01-18 17:43:27,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.9903147699757868) internal successors, (822), 413 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 822 transitions. [2022-01-18 17:43:27,815 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 822 transitions. Word has length 30 [2022-01-18 17:43:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:27,815 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 822 transitions. [2022-01-18 17:43:27,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 822 transitions. [2022-01-18 17:43:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:27,816 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:27,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:27,831 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 17:43:28,016 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,SelfDestructingSolverStorable218 [2022-01-18 17:43:28,016 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1821042829, now seen corresponding path program 207 times [2022-01-18 17:43:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:28,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477450397] [2022-01-18 17:43:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:28,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:28,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477450397] [2022-01-18 17:43:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477450397] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448427641] [2022-01-18 17:43:28,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 17:43:28,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:28,304 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 17:43:28,304 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 17:43:28,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 17:43:28,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:28,391 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 17:43:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:28,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:29,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:29,095 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 28 treesize of output 30 [2022-01-18 17:43:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:29,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448427641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:29,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:29,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:43:29,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709959976] [2022-01-18 17:43:29,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:29,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:43:29,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:43:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:43:29,230 INFO L87 Difference]: Start difference. First operand 414 states and 822 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 17:43:30,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:30,708 INFO L93 Difference]: Finished difference Result 804 states and 1576 transitions. [2022-01-18 17:43:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 17:43:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 30 [2022-01-18 17:43:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:30,710 INFO L225 Difference]: With dead ends: 804 [2022-01-18 17:43:30,710 INFO L226 Difference]: Without dead ends: 795 [2022-01-18 17:43:30,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=386, Invalid=3274, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:30,710 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 143 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:30,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 429 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:43:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-01-18 17:43:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 416. [2022-01-18 17:43:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.9879518072289157) internal successors, (825), 415 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 825 transitions. [2022-01-18 17:43:30,715 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 825 transitions. Word has length 30 [2022-01-18 17:43:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:30,715 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 825 transitions. [2022-01-18 17:43:30,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 17:43:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 825 transitions. [2022-01-18 17:43:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:30,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:30,716 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:30,747 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 17:43:30,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:30,939 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:30,939 INFO L85 PathProgramCache]: Analyzing trace with hash -938977105, now seen corresponding path program 208 times [2022-01-18 17:43:30,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:30,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107582749] [2022-01-18 17:43:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:30,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:31,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107582749] [2022-01-18 17:43:31,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107582749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:31,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158615429] [2022-01-18 17:43:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 17:43:31,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:31,232 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 17:43:31,232 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 17:43:31,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 17:43:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:31,318 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 17:43:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:31,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:32,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:32,027 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 28 treesize of output 30 [2022-01-18 17:43:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:32,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158615429] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:32,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:32,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:43:32,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750471632] [2022-01-18 17:43:32,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:32,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:43:32,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:32,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:43:32,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:43:32,172 INFO L87 Difference]: Start difference. First operand 416 states and 825 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 17:43:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:33,754 INFO L93 Difference]: Finished difference Result 677 states and 1336 transitions. [2022-01-18 17:43:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 17:43:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 30 [2022-01-18 17:43:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:33,755 INFO L225 Difference]: With dead ends: 677 [2022-01-18 17:43:33,755 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 17:43:33,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=414, Invalid=3246, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 17:43:33,755 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:33,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 377 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 17:43:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 406. [2022-01-18 17:43:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.0) internal successors, (810), 405 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 810 transitions. [2022-01-18 17:43:33,760 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 810 transitions. Word has length 30 [2022-01-18 17:43:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:33,760 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 810 transitions. [2022-01-18 17:43:33,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 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 17:43:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 810 transitions. [2022-01-18 17:43:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:33,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:33,761 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:33,779 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 17:43:33,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:33,967 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1816984755, now seen corresponding path program 209 times [2022-01-18 17:43:33,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:33,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846850003] [2022-01-18 17:43:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:33,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846850003] [2022-01-18 17:43:34,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846850003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025992941] [2022-01-18 17:43:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 17:43:34,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:34,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:34,261 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 17:43:34,262 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 17:43:34,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 17:43:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:43:34,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:34,350 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 17:43:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:34,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:35,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:35,049 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 28 treesize of output 30 [2022-01-18 17:43:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:35,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025992941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:35,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:35,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-18 17:43:35,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489199924] [2022-01-18 17:43:35,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:35,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 17:43:35,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:35,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 17:43:35,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 17:43:35,181 INFO L87 Difference]: Start difference. First operand 406 states and 810 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:36,554 INFO L93 Difference]: Finished difference Result 787 states and 1549 transitions. [2022-01-18 17:43:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:43:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 17:43:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:36,556 INFO L225 Difference]: With dead ends: 787 [2022-01-18 17:43:36,556 INFO L226 Difference]: Without dead ends: 754 [2022-01-18 17:43:36,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=3386, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 17:43:36,556 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 138 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:36,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 426 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-01-18 17:43:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 401. [2022-01-18 17:43:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.0025) internal successors, (801), 400 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 801 transitions. [2022-01-18 17:43:36,561 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 801 transitions. Word has length 30 [2022-01-18 17:43:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 801 transitions. [2022-01-18 17:43:36,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 801 transitions. [2022-01-18 17:43:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:36,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:36,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:36,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:36,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 17:43:36,762 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:36,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1470622705, now seen corresponding path program 210 times [2022-01-18 17:43:36,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:36,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996341503] [2022-01-18 17:43:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:36,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:37,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996341503] [2022-01-18 17:43:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996341503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064536720] [2022-01-18 17:43:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 17:43:37,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:37,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:37,070 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 17:43:37,070 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 17:43:37,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 17:43:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 17:43:37,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 17:43:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:37,222 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 17:43:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:37,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:37,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:37,931 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 28 treesize of output 30 [2022-01-18 17:43:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:38,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064536720] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:38,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:38,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:43:38,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152650048] [2022-01-18 17:43:38,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:38,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:43:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:43:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:43:38,076 INFO L87 Difference]: Start difference. First operand 401 states and 801 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:39,497 INFO L93 Difference]: Finished difference Result 822 states and 1614 transitions. [2022-01-18 17:43:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-18 17:43:39,497 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:43:39,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:39,498 INFO L225 Difference]: With dead ends: 822 [2022-01-18 17:43:39,498 INFO L226 Difference]: Without dead ends: 813 [2022-01-18 17:43:39,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=472, Invalid=4220, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:43:39,499 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:39,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 302 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-18 17:43:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-18 17:43:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 419. [2022-01-18 17:43:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.0) internal successors, (836), 418 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 836 transitions. [2022-01-18 17:43:39,505 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 836 transitions. Word has length 30 [2022-01-18 17:43:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:39,505 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 836 transitions. [2022-01-18 17:43:39,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:39,505 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 836 transitions. [2022-01-18 17:43:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:39,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:39,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:39,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-01-18 17:43:39,723 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,SelfDestructingSolverStorable222 [2022-01-18 17:43:39,724 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1942278867, now seen corresponding path program 211 times [2022-01-18 17:43:39,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486575229] [2022-01-18 17:43:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:40,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 17:43:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486575229] [2022-01-18 17:43:40,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486575229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 17:43:40,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096226241] [2022-01-18 17:43:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 17:43:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 17:43:40,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 17:43:40,032 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 17:43:40,032 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 17:43:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 17:43:40,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-18 17:43:40,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 17:43:40,182 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 17:43:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:40,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 17:43:40,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 17:43:40,980 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 28 treesize of output 30 [2022-01-18 17:43:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 17:43:41,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096226241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 17:43:41,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 17:43:41,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 42 [2022-01-18 17:43:41,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61891442] [2022-01-18 17:43:41,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 17:43:41,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-18 17:43:41,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 17:43:41,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-18 17:43:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 17:43:41,115 INFO L87 Difference]: Start difference. First operand 419 states and 836 transitions. Second operand has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:42,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 17:43:42,907 INFO L93 Difference]: Finished difference Result 706 states and 1396 transitions. [2022-01-18 17:43:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 17:43:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 17:43:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 17:43:42,908 INFO L225 Difference]: With dead ends: 706 [2022-01-18 17:43:42,908 INFO L226 Difference]: Without dead ends: 691 [2022-01-18 17:43:42,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1531 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=503, Invalid=4189, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 17:43:42,909 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 152 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 17:43:42,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 406 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-18 17:43:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-01-18 17:43:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 417. [2022-01-18 17:43:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.0) internal successors, (832), 416 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 832 transitions. [2022-01-18 17:43:42,913 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 832 transitions. Word has length 30 [2022-01-18 17:43:42,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 17:43:42,913 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 832 transitions. [2022-01-18 17:43:42,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.744186046511628) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 17:43:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 832 transitions. [2022-01-18 17:43:42,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-18 17:43:42,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 17:43:42,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 17:43:42,929 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 17:43:43,114 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,SelfDestructingSolverStorable223 [2022-01-18 17:43:43,114 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 17:43:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 17:43:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash -473612149, now seen corresponding path program 212 times [2022-01-18 17:43:43,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 17:43:43,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142209074] [2022-01-18 17:43:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 17:43:43,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 17:43:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2022-01-18 17:43:43,274 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-01-18 17:43:43,274 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 17:43:43,277 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 17:43:43,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-01-18 17:43:43,278 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. [2022-01-18 17:43:43,279 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 17:43:43,279 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 17:43:43,281 INFO L732 BasicCegarLoop]: Path program histogram: [212, 12, 1] [2022-01-18 17:43:43,286 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 17:43:43,286 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 17:43:43,288 INFO L202 PluginConnector]: Adding new model queue-add-2-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 05:43:43 BasicIcfg [2022-01-18 17:43:43,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 17:43:43,290 INFO L158 Benchmark]: Toolchain (without parser) took 723367.12ms. Allocated memory was 398.5MB in the beginning and 478.2MB in the end (delta: 79.7MB). Free memory was 360.3MB in the beginning and 448.2MB in the end (delta: -87.9MB). Peak memory consumption was 276.6MB. Max. memory is 16.0GB. [2022-01-18 17:43:43,290 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 398.5MB. Free memory is still 361.5MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:43:43,291 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.34ms. Allocated memory is still 398.5MB. Free memory was 360.3MB in the beginning and 358.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 17:43:43,291 INFO L158 Benchmark]: Boogie Preprocessor took 22.51ms. Allocated memory is still 398.5MB. Free memory was 358.8MB in the beginning and 357.8MB in the end (delta: 997.8kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 17:43:43,291 INFO L158 Benchmark]: RCFGBuilder took 241.99ms. Allocated memory is still 398.5MB. Free memory was 357.8MB in the beginning and 348.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2022-01-18 17:43:43,291 INFO L158 Benchmark]: TraceAbstraction took 723064.70ms. Allocated memory was 398.5MB in the beginning and 478.2MB in the end (delta: 79.7MB). Free memory was 347.7MB in the beginning and 448.2MB in the end (delta: -100.5MB). Peak memory consumption was 261.9MB. Max. memory is 16.0GB. [2022-01-18 17:43:43,295 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 398.5MB. Free memory is still 361.5MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.34ms. Allocated memory is still 398.5MB. Free memory was 360.3MB in the beginning and 358.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.51ms. Allocated memory is still 398.5MB. Free memory was 358.8MB in the beginning and 357.8MB in the end (delta: 997.8kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 241.99ms. Allocated memory is still 398.5MB. Free memory was 357.8MB in the beginning and 348.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * TraceAbstraction took 723064.70ms. Allocated memory was 398.5MB in the beginning and 478.2MB in the end (delta: 79.7MB). Free memory was 347.7MB in the beginning and 448.2MB in the end (delta: -100.5MB). Peak memory consumption was 261.9MB. 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 16ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 723.0s, OverallIterations: 225, TraceHistogramMax: 2, PathProgramHistogramMax: 212, EmptinessCheckTime: 0.1s, AutomataDifference: 381.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40597 SdHoareTripleChecker+Valid, 149.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 40597 mSDsluCounter, 95538 SdHoareTripleChecker+Invalid, 125.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5426 IncrementalHoareTripleChecker+Unchecked, 166235 mSDsCounter, 19392 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 394313 IncrementalHoareTripleChecker+Invalid, 419131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 19392 mSolverCounterUnsat, 6995 mSDtfsCounter, 394313 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22805 GetRequests, 6456 SyntacticMatches, 1573 SemanticMatches, 14776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303460 ImplicationChecksByTransitivity, 381.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=435occurred in iteration=128, InterpolantAutomatonStates: 8971, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 224 MinimizatonAttempts, 78210 StatesRemovedByMinimization, 222 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 287.5s InterpolantComputationTime, 13133 NumberOfCodeBlocks, 13133 NumberOfCodeBlocksAsserted, 645 NumberOfCheckSat, 19002 ConstructedInterpolants, 119 QuantifiedInterpolants, 346126 SizeOfPredicates, 2989 NumberOfNonLiveVariables, 15038 ConjunctsInSsa, 6802 ConjunctsInUnsatCore, 666 InterpolantComputations, 3 PerfectInterpolantSequences, 8/5084 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